Logo for N.C. Cooperative Extension N.C. Cooperative Extension Homepage

Development of Specialty-Type Potatoes for Eastern NC

PROJECT LEADER(S): Mark Clough, Wilfred “Bill” Jester and Craig Yencho

LOCATION: Cunningham Research Station in Kinston, Tidewater Research Station in Plymouth, James Brother’s Farm in Weeksville, and McCotter Farms in Bayboro

IMPACT
We have identified a purple-skinned, yellow-fleshed specialty-type potato that we believe has great potential for growers interested in raising specialty-type potatoes. This clone, designated B1816-5, was bred by Dr. Kathy Haynes, USDA-ARS, Beltsville, MD. We are conducting cooperative research with her and others in NC and elsewhere to evaluate the market potential of B1816-5. Certified foundation seed of B1816-5 is being increased at Cornell University’s Uihlein Farm in anticipation of variety release. B1816-5 has been displayed at the Specialty Crops Field Day at the Cuningham Research Station (CRS) since 2002 and has been received favorably each time as it is very attractive and well adapted to NC’s environment. Fund from the SCP have enabled us to get this clone into the hands of several large and small growers who are evaluating the market potential of this clone and other specialty-type potatoes. The purple skin and golden flesh color of B1816-5 have a particular attraction to some in eastern NC (e.g. alumni of East Carolina University whose school colors are purple and gold) and we believe that with appropriate marketing this new variety could be readily sold to restaurant chefs and/or those who would typically buy the higher priced gourmet potatoes. The increased nutritional content of yellow fleshed potatoes (they provide over 40% of the RDA of vitamin C) and the fact that most yellow-fleshed potatoes contain higher levels of lutein, a carotenoid plant pigment that has been shown to reduce the risk of macular degeneration and is thought to reduce the risk of heart disease, can be used to enhance their marketability. In addition to B1816-5, we are evaluating several other specialty-type potatoes in NC and anticipate that several of these will also be adopted in the future contributing to the diversification of small and large farms in rural eastern NC.

INTRODUCTION

Potatoes in eastern North Carolina (NC) are currently grown to meet the needs of two very important spring markets. The first is the chipping industry that comprises roughly 60% of NC’s crop. The other is the table-stock market comprised of round white and red-skinned table-stock potatoes. Within the table-stock market there exists a demand for specialty-type gourmet or novelty potatoes to serve not only restaurants, but the individual consumer as well. The objectives of this research are develop specialty-type potato varieties for use in NC.

METHODS

Four variety trials (2 on-farm and 2 research station trials) were established to evaluate the performance of conventional table-stock, processing and specialty-type potatoes such as B1816-5. The CRS SCP trial had 13 clones. All except two were either purple- or red-skinned table- or specialty-type potatoes. The NE-1014 Regional Potato Variety Development Project Red Variety Trial (NE-RD) had 24 red and purple varieties. The James Brother’s trial included 13 white (5 yellow flesh), 1 purple and 4 red clones. The McCotter trial included 12 whites, 1 purple and 2 red clones. All trials were planted in a randomized complete block design with 4 replications. Plots consisted of one row with 28 hills spaced 9 inches apart. Spacing between rows was 38 inches at all sites, with the exception of the James Brother’s Trial, which was on a 40 inch row spacing.

The on-farm trials and the SCP were dug using a single-row digger and hand harvested. The NE-RD trial was harvested using a two-row harvester modified to dig one row at a time. Both grower trials were graded using a portable Lockwood Grader which sorts to two grades: A+B’s ≥ 1 7/8”; and C’s < 1 7/8”. The NE-RD and the SCP were graded to five classes: 1’s < 1 7/8”; 2’s > 1 7/8 to 2 1/2”; 3’s > 2 1/2 to 3 1/4”; 4’s > 3 1/4 to 4”; 5’s > 4”. Culls were removed and weighed separately in all trials. Each clone was evaluated for tuber quality and appearance during grading using standardized NE-1014 rating codes. A description of the rating codes is provided in Appendix 1.

RESULTS

James Brother’s Variety Trial (Tables 1a and 1b)
Generally, we place our most promising varieties in this trial because growers and allied industry members visit this site in May during the half-day Potato Tour held during the Annual Meeting of the NC Potato Association, held in Elizabeth City. Because of the diversity of materials in this test (we plant processing, table-stock and specialty-type lines to appeal to a broad audience) three standards for yield are compared: Atlantic (round white processing standard), Chieftain (red table-stock standard), and Yukon Gold (yellow-fleshed specialty-type standard). The most interesting red-skinned and/or specialty-type clones in this trial were: B1816-5 (purple-skinned, dark yellow flesh); Vivaldi (buff-skinned, yellow flesh); and NY129 (red-skinned, white flesh). B1816-5, Vivaldi and NY129 had a marketable yield of 239, 170 and 161 cwt/A, respectively. B1816-5 was given a 7 for overall appearance, while Vivaldi and NY129 were rated 6 and 5, respectively. None of these clones had any problems with internal heat necrosis (IHN), which can be a significant quality limitation in the mid-Atlantic region. Overall, from a specialty-crop perspective we were very favorably impressed with the performance of B1816-5 and Vivaldi, and we anticipate that several growers who saw these materials in this trial and elsewhere will try planting them in 2005. The breeding program is facilitating the distribution of the very limited amounts of seed of B1816-5 at this point. Vivaldi, a clone developed and marketed by HZPC Americas Corp, Presque Isle, Canada, has arranged to have several growers in the Elizabeth City area to plant 5-10 acres of this clone and they are facilitating marketing.

McCotter Farms Variety Trial (Tables 2a and 2b)
Yields in this trial were lower than what we have seen in past years. This was due, in large measure, to the lack of rainfall throughout the growing season. B1816-5, MSI005-20Y, ND3196-1R, NY125, NY129, Yukon Gold and Vivaldi were the yellow-fleshed table-stock, red-skinned and/or specialty-type lines entered in this trial. From a specialty-crop perspective B1816-5 and Vivaldi were standouts with marketable yields of 169 cwt/A and 178 cwt/A and overall appearance scores of 6 and 8, respectively. As in the James Brother’s trials, neither of these clones had internal problems. We were hoping that ND3196-1R might be a good purple-skinned clone, but its yield was low and it had a very poor overall appearance score (3).

Specialty Crops Variety Trial at the CRS (Tables 3a and 3b)
This trial was specifically designed to focus on reds, purples, and other specialty-type potatoes that we believe may fill various niche markets in our state. None of the clones in the trial significantly exceeded the standard yield of Chieftain (157 cwt/A). Two clones, however, did have greater yields [B1816-5 (171 cwt/A), and La Rouge (179 cwt/A)]. As in the other trials B1816-5 performed very well. Yukon Gold was assigned the best overall appearance score at a 7, while B1816-6 was rated a 6. No internal defects were observed in B1816-5, but we did observe a significant amount of silver scurf on this clone, which can be controlled to some extent by seed treatments. Another interesting clone that was evaluated in this trial was the russet variety Amey. Amey was recently released by the USDA-ARS in cooperation with several eastern states including NC. We call Amey a “baby russet” because this variety produces a good crop of small to medium-sized russet potatoes that are very attractive in appearance and very tasty. We think that there may be a market for this so-called “baby russet” as growers and consumers become more familiar with it. However, it is worth noting that Amey had the highest percent IHN levels at 10% observed in this trial, but the IHN severity rating was not exceptionally serious with an IHN rating of 8.

NE1014 Regional Potato Variety Development Project Red Variety Trial. (Tables 4a and 4b)
Of the twenty-three clones in this trial none of them had a higher marketable yield than the standard Chieftain (177 cwt/A). But it is important to note that over 53% of the tubers sampled in Chieftain had severe IHN. NDTX731-1R was the only clone to have an overall appearance rating of 8, while B1816-5 was assigned an appearance score of 5, which was largely due to the presence of silver scurf. Several other very attractive red-skinned clones were: B2066-3; B2079-6; Dark Red Norland; and ND8089-2R, each of which was assigned an overall appearance rating of 7. B2066-6 and B2079-6 were selected in Maine during our potato harvest for their ability to produce a crop of small “B-sized” potatoes and they appear to do this very well. We hope to evaluate them next year in other trials.

CONCLUSION

The most promising specialty-type potato varieties evaluated during 2004 are listed below with notes on their potential “fit.”

B1816-5 (Fig. 1) has an attractive dark purple skin and yellow flesh. We believe that it has significant potential in NC but growers will need to control silver scurf on it if they are to achieve it’s potential. Silver Scurf is a fugal pathogen on the surface of the potato that does not affect internal quality, but it can detract from appearance. B1816-5, like many other red- and purple-skinned varieties, is susceptible to silver scurf so this disease is not new to potato producers, especially those accustomed to producing red varieties. Treatment with a fungicide at planting can minimize the presence of this pathogen. In 2004 we distributed about 120 lbs to two very different local growers. Ferebee Farms located in Camden County (a large grower) received 100 lbs and had very positive things to say about B1816-5. Their farm manager brought it to a restaurant trade show in Chicago, IL where it also received favorable reviews. Our other grower, Kenneth Waters, is a small grower with a roadside stand near Chocowinity. He too commented on its quality and the ready acceptance by local consumers. He noted that a couple of higher end restaurants in the area were interested in using it during 2005. During 2005, we will have roughly 300 to 400 lbs available and will attempt similar efforts to put small quantities of B1816-5 seed in the hands of growers allowing them to evaluate and develop markets for the clone.

Michigan Purple (Fig. 2) was in the CRS SPC trial in 2004. It is a high yielding purple-skinned, white-fleshed potato. We consistently rate this clone with a low appearance score, but this is largely due to excessive skinning and its high susceptibility to scab. Growers (organic and conventional) who take special precautions to minimize skinning and do not have scab problems, and/or home gardeners who hand harvest potatoes might be the appropriate market for this unique potato in NC as it is flavorful, and it’s smooth light purple skin and white flesh are very attractive.

Amey (Fig. 3) is an attractive “baby russet” potato intended for table markets. This variety was released by the USDA-ARS in 2001. Our program has included this variety in 14 trials since 1995 but only in the SPC trial in 2004. It is well adapted to NC and has some resistance to Golden Nematode, Powdery Scab, and Common Scab. In the future we will continue to include this variety as it my have potential in a portion conscious environment, and provide a viable baking alternative to the large russets commonly available in stores.

In future trials we intend to continue breeding and selecting new specialty-type lines as well as to look for small “B-sized” reds such as B2066-6 and B2079-6.

TABLES & PHOTOS

B1816-5

Fig. 1. B1816-5. A medium to small purple skin yellow flesh potato

Michigan Purple

Fig. 2. Michigan Purple. A medium large purple skin white flesh potato

Amey

Fig. 3. Amey. A medium white flesh russet potato

Table 1a. James Brother’s Farm Variety Trial. Total and marketable yield, percentage of total yield by size class, and specific

gravity of potato clones harvested 110 DAP1 (102 DVK1) at James Brother’s Farm, Weeksville, Pasquotank Co., NC – 2004.

Size Distribution by Class2

                                Total Yield                             Marketable Yield                                (% of total yield)                               Specific           Chip Color4

Clone                          cwt/A               cwt/A      % Atl.   %Yukon    %Chieftain      A’s + B’s                       C’s         Culls        Gravity3                                               TRS       Wise

Atlantic                                    304                  279        100        101            154                              91                  7               1             1.067                                                 2           3

B0766-3                                 299                  272        102        99              156                              91                  7               2             1.065                                                 1           2

B1240-1                                 219                  201        73          75              108                              92                  7               1             1.051                                                 3           5

B1806-8                                 269                  223        86          84              127                              81                  16            3             1.063                                                 .            .

B1816-5                                 303                  239        92          91              133                              75                  23            2             1.062                                                 .            .

B2135-163                             321                  280        105        99              152                              87                  10            3             1.064                                                 1           2.5

Cherry Red                             236                  184        67          68              98                                78                  16            6             1.061                                                 .            .

Chieftain                                 297                 197        72          73              100                              65                  14            20          1.05                                                 .            .

Harley Blackwell                   297                  209        78          74              116                              70                  19            11          1.057                                                 1           2.5

Marcy                                      287                  263        97          97              142                              91                  8               0             1.063                                                 2           3

NorDonna                              239                  121        42          45              63                                49                  22            29          1.052                                                 .            .

NY125                                     330                  273        97          100            149                              82                  14            4             1.062                                                 .            .

NY126                                     211                  156        59          59              79                                71                  15            14          1.057                                                 .            .

NY129                                     234                  161        59          59              96                                67                  25            7             1.051                                                 .            .

Snowden                                253                  206        79          75              115                              80                  17            3             1.059                                                 2           2.5

Superior                                 265                  229        86          86              130                              86                  13            2             1.065                                                 2           3

Vivaldi                                     280                  170        57          61              92                                56                  35            8             1.053                                                 .            .

Yukon Gold                            311                  284        104        100            158                              91                  7               2             1.067                                                 .            .

Grand Mean                          275                  219

CV (%)                                     20                    30

LSD (K= 100)                        90.1                 81.8

1 DAP = Days After Planting; DVK = Days to Vine Kill                                     

2 Size classes: A’s + B’s > 1 7/8″; C’s ≤ 1 7/8″; Culls = all defective potatoes.                                            

3 Determined by weight in air/water method.                                              

4 Chip Color Ratings conducted by Wise Foods Inc. and the NCSU potato breeding program at the TRS/VGJREC:                                 

1 = no defects, exceptionally bright; 2 = excellent, bright; 3 = good, light or golden; 4 = dark defects, marginal; 5 = not acceptable.

Table 1b. James Brother’s Farm Variety Trial. Plant vine type, disease and air pollution scores, maturity at ca. 3 weeks prior to harvest, external

and internal tuber attributes, of potato clones harvested 110 DAP1 (102 DVK1) at James Bros. Farm, Weeksville, Pasquotank Co., NC-2004

       Plant Data2                                                     Tuber Data2                                                     % Internal Defects3        

Clone                       TYPE DIS  POLL MAT         CLR TXT  TCX TSS SHP EYE SIZE  DIS  APP          HN     HNR HH VR    BC                                           SR               Comments4

Atlantic                                  6       8       7         6               7       5       7       7       2       6       6         8       7                 23      8       0   0       0     0                                               MS, SC, SR

B0766-3                               6       9       8         5               8       5       7       6       2       6       5         8       5                 0         9       0   13    0     0                                               MS, SG, SS

B1240-1                               5       8       7         6               7       5       5       5       3       7       5         7       6                 0         9       0   0       3     0                                               MS, SC, SS

B1806-8                               6       8       9         5               7       7       5       4       4       7       4         6       4                 0         9       0   15    0     0                                               ^SR   YF2

B1816-5                               6       8       9         3               1       6       5       6       4       7       5         7       7                 0         9       0   13    0     0                                               MS,GC ~Pts   YF2

B2135-163                           6       9       8         5               6       6       7       6       2       7       5         7       6                 0         9       0   0       0     0                                               MS, GC, SG, RZ

Cherry Red                           8       9       9         5               2       5       7       7       2       8       5         .        5                 0         9       0   0       0     0                                               SG, Pts, GC, RZ, FS, MS

Chieftain                               8       8       8         5               3       7       7       4       3       5       5         7       4                 13      8       0   15    0     0                                               ^ SG, RZ, ^MS, GC

Harley Blackwell                 6       8       8         6               7       5       7       7       2       7       5         6       5                 0         9       0   10    0     0                                               ^SC, MS, SG

Marcy                                    7       8       7         7               7       5       7       7       3       8       7         9       8                 3         8.8   0   3       0     0                                               MS

NorDonna                            6       9       8         5               2       8       5       6       3       7       5         7       4                 0         9       0   8       0     0                                               ^SG, MS

NY125                                   6       8       9         6               7       7       6       7       4       7       6         8       7                 0         9       0   3       0     0                                               SG, MS YF1

NY126                                   6       7       8         6               7       6       5       5       3       8       5         8       4                 0         9       0   3       0     0                                               MS, ^ Pts   YF1

NY129                                   6       8       9         7               2       6       7       7       2       8       5         5       5                 0         9       0   5       0     0                                               IL, MS, GC

Snowden                              6       9       8         7               6       5       5       7       2       5       5         8       5                 0         9       0   0       0     0                                               DAE, DSE, SS, MS, FS

Superior                               7       8       9         4               7       5       7       7       3       7       5         8       8                 0         9       0   3       0     0                                               GC, MS

Vivaldi                                   6       8       8         7               7       8       5       7       3       8       4         8       6                 0         9       0   0       0     0                                               ^SG, MS, YF1

Yukon Gold                          8       9       8         6               7       7       7       5       3       7       6         8       6                 13      8.3   0   0       0     0                                               IL, MS, SG  YF2

1 DAP = Days After Planting; DVK = Days to Vine Kill               

2 See NE184 Standard Potato Rating System for key to scores in Appendix 2.              

3 Percentage determined from 10 randomly selected potatoes /rep (40 total) in A and B size classes. HN=heat necrosis; HNR=average heat necrosis rating (Rating Scale: 1= very severe to 9 = absent); HH=hollow heart; VR=vascular ring discoloration; BC=brown center; SR=soft rot

4 See Appendix 2 for Comment Codes

Table 2a. McCotter’s Farm Variety Trial. Total and marketable yield, percentage of total yield by size class, specific

gravity and chip scores of potato clones harvested 107 DAP1 at McCotter’s Farm, Bayboro, Pamlico Co., NC – 2004

Size Distribution by Class2

                                Total Yield                                            Marketable Yield                  (% of total yield)                                Specific           Chip Color4

Clone                          cwt/A                                   cwt/A               % Atl.     %Yuk     A’s + B’s                C’s      Culls              Gravity3                                               TRS                               Wise

Atlantic                                    276                                      221                  100        103            80                    11          9                   1.070                                                 2                   3

B0766-3                                 240                                      182                  83          85              75                    18          7                   1.066                                                 1                   2

B1816-5                                 236                                      169                  79          79              71                    27          1                   1.070                                                 .                    .

B2135-163                             304                                      251                  116        117            82                    13          5                   1.069                                                 1                   3.5

Marcy                                      309                                      272                  123        127            88                    11          1                   1.070                                                 1                   2

MSI005-20Y                          243                                      166                  75          76              67                    31          2                   1.061                                                 .                    .

MSJ461-1                              168                                      78                    36          36              45                    52          3                   1.059                                                 3                   5

ND3196-1R                           142                                      63                    28          29              44                    32          24                1.059                                                 .                    .

NY125                                     259                                      175                  79          82              68                    31          1                   1.066                                                 .                    .

NY126                                     253                                      219                  99          102            87                    13          1                   1.073                                                 .                    .

NY129                                     229                                      147                  66          69              64                    34          2                   1.058                                                 .                    .

Snowden                                211                                      137                  61          64              64                    31          5                   1.071                                                 2                   2.5

Superior                                 251                                      190                  87          89              74                    21          4                   1.076                                                 2                   4

Vivaldi                                     273                                      178                  79          83              63                    36          1                   1.064                                                 .                    .

Yukon Gold                            258                                      214                  98          100            83                    9             8                   1.071                                                 .                    .

Grand Mean                          243                                      178

CV (%)                                     14                                        22

LSD (K= 100)                        47.2                                     53.4

1 DAP = Days After Planting; DVK = Days to Vine Kill                                     

2 Size classes: A’s + B’s > 1 7/8″; C’s ≤ 1 7/8″; Culls = all defective potatoes.                                            

3 Determined by weight in air/water method.                                              

4 Chip Color Ratings conducted by Wise Foods Inc. and the NCSU potato breeding program at the TRS/VGJREC:                                 

1 = no defects, exceptionally bright; 2 = excellent, bright; 3 = good, light or golden; 4 = dark defects, marginal; 5 = not acceptable.

Table 2b. McCotter’s Farm Variety Trial. Plant vine type, disease and air pollution scores, maturity at ca. 3 weeks prior to harvest, and

external and internal tuber attributes of potato clones harvested 107 DAP1 at McCotter’s Farm, Bayboro, Pamlico Co., NC – 2004

       Plant Data2                                                     Tuber Data2                                                   % Internal Defects3         

Clone                       TYPE DIS  POLL MAT         CLR TXT  TCX TSS SHP EYE SIZE  DIS  APP          HN     HNR HH VR    BC                                           SR               Comments4

Atlantic                                6         8       7         5               7       5       7       8       2       6       6         7       5               23        7.8   5     0     13  0                                              MS, SC, DAE, DSE, GC

B0766-3                             6         8       6         6               6       6       7       8       2       7       3         5       4               3           8.8   0     0     3     0                                              FS,SC, SS, MS

B1816-5                             6         8       8         4               1       8       7       8       4       8       3         7       6               0           9       0     0     0     0                                              SISC, MS  YF2

B2135-163                         6         8       8         4               9       7       7       7       2       8       5         7       7               0           9       0     0     0     8                                              SS, SISC, SR, GC

Marcy                                  9         8       7         8               7       5       7       6       3       8       7         8       7               0           9       0     0     0     0                                              GC,^ RZ, SR, MS

MSI005-20Y                      5         9       8         5               6       5       5       7       2       7       3         8       5               0           9       0     0     0     5                                              SS, MS, SR  YF1.5

MSJ461-1                          6         8       7         5               6       8       7       7       2       7       2         8       4               0           9       0     0     0     3                                              GC, SS

ND3196-1R                       4         6       8         4               1       8       7       8       2       7       1         3       3               0           9       0     0     5                                             10                SCB, SS, RZ

NY125                                 6         9       8         7               9       8       5       7       3       8       3         7       6               0           9       0     0     0     3                                              SS, SR   YF1

NY126                                 8         8       8         8               6       6       7       7       4       7       7         7       7               0           9       0     0     0     0                                              SS, YF1

NY129                                 9         9       8         7               3       6       7       7       1       8       2         4       4               0           9       0     0     0     0                                              ^ IL, RZ

Snowden                            7         8       7         7               6       5       7       7       2       5       3         8       4               0           9       0     0     0     0                                              DSE, MS, FS

Superior                             9         8       7         5               6       7       7       7       3       6       5         6       5               0           8.8   0     0     0     3                                              ^SR, FS, MS, SS

Vivaldi                                 8         8       8         6               9       9       7       8       5       8       5         8       8               0           9       0     0     0     0                                              MS       YF1.5

Yukon Gold                        9         8       8         6               7       8       7       8       3       7       6         6       6               30        7.5   0     0     5     0                                              MS, SR, SS

1 DAP = Days After Planting; DVK = Days to Vine Kill               

2 See NE1014 Standard Potato Rating System for key to scores in Appendix 1.            

3 Percentage determined from 10 randomly selected potatoes /rep (40 total) in A and B size classes. HN=heat necrosis; HNR=average heat necrosis rating (Rating Scale: 1= very severe to 9 = absent); HH=hollow heart; VR=vascular ring discoloration; BC=brown center; SR=soft rot

4 See Appendix 2 for Comment Codes

Table 3a. Specialty Crops Trial. Total and marketable yield, percentage of total yield by size class, and specific

gravity of potato clones harvested 118 DAP1 at the NCSU/NCDA CRS, Kinston, Lenoir Co., NC – 2004

Size Dist. by Class (%)2

Total Yield                            Marketable Yield                        (% of total yield)                                1 7/8               2 1/2                                            Specific

CLONE                  cwt/A                           cwt/A         % Chieftain            1’s    2’s    3’s    4’s   5’s   Cull’s           to 4″               to 4″                                                                        Gravity3

Amey                               168                                122              84                      22      55    17    0       0       5                   72                    17                                               .

B1763-4                         135                                90                53                      28      44    19    0       0       10                63                    19                                               1.063

B1816-5                         220                                171              136                    19      55    22    0       0       4                   77                    22                                               1.059

B1952-2                         160                                115              86                      16      54    19    0       0       11                73                    19                                               1.065

B2079-6                         150                                80                52                      46      47    4       0       0       3                   51                    4                                                  1.063

Chieftain                         219                                157              100                    23      56    13    0       0       8                  69                    13                                               1.052

Cherry Red                     171                                113              90                      28      60    6       0       0       7                   66                    6                                                  1.068

Dark Red Norland        152                                87                62                      35      48    6       0       0       11                54                    6                                                  1.051

La Rouge                       235                                179              135                    15      50    25    0       0       9                   76                    25                                               1.053

Michigan Purple           182                                144              96                      11      42    36    0       0       11                78                    36                                               .

NorDonna                      216                                108              79                      32      48    2       0       0       18                50                    2                                                  1.049

NY129                             151                                98                75                      28      47    19    0       0       7                   66                    19                                               1.050

Yukon Gold                    174                                135              102                    14      46    32    0       0       8                   78                    32                                               1.060

Grand Mean                  179                                123

CV (%)                             28                                  35

LSD (K=100)                 78.2                               74.5

1 DAP = Days After Planting; DVK = Days to Vine Kill                                            

2 Size classes: A’s + B’s > 1 7/8″; C’s ≤ 1 7/8″; Culls = all defective potatoes.                                                

3 Determined by weight in air/water method.                         

Table 3b. Specialty Crops Trial. Plant vine type, disease and air pollution scores, maturity at ca. 3 weeks prior to harvest, and external

and internal tuber attributes of potato clones harvested 118 DAP1 at the NCSU/NCDA CRS, Kinston, Lenoir Co., NC – 2004

       Plant Data2                                                     Tuber Data2                                                   % Internal Defects3         

Clone                       TYPE DIS  POLL MAT         CLR TXT  TCX TSS SHP EYE SIZE  DIS  APP          HN     HNR HH VR    BC                                           SR               Comments4

Amey                                   7         8       8         5               5       3       5       7       6       7       3         7       6               10        8       3     0       3   8                                              ^SR

B1763-4                             6         8       8         3               1       6       7       7       2       7       5         6       5               0           9       0     0       0                                             10                SISC, MS, SG, SR

B1816-5                             6         8       8         3               1       6       5       7       4       8       5         7       6               0           9       0     0       0   3                                              SISC, GC, MS YF2

B1952-2                             7         8       8         2               1       7       7       7       2       6       5         7       6               0           9       0     0       0   5                                              GC, SISC, SR, MS

B2079-6                             8         6       8         1               2       7       2       7       2       6       3         7       6               3           8.8   0     0       0   3                                              GC, SISC, SR, SG

Chieftain                             9         7       8         4               3       7       7       7       2       6       5         7       6               8           8.3   0     0       3   3                                              GC, SS, MS, SISC, SR, SG

Cherry Red                         6         9       8         3               2       6       7       7       2       6       5         7       5               0           9       0     0       3   3                                              SS, GC, MS, SG, SR

Dark Red Norland            5         7       7         1               2       7       7       7       2       6       5         6       6               0           9       0     0       0   0                                              IL, SR, RZ, SISC, SS

La Rouge                           6         8       8         5               3       7       7       7       2       5       5         7       5               3           8.8   0     0       0   0                                              MS, SR, SS, GC, DAE

Michigan Purple               5         8       8         4               1       8       5       7       3       6       7         5       4               0           9       0     0       0   0                                              ^SISC, SCB, SR, MS, GC

NorDonna                          8         8       8         5               2       7       7       7       2       7       4         6       4               0           8.5   0     0       0   0                                              ^SG, RZ, IL, SISC, SR, MS

NY129                                 8         8       8         5               2       6       7       7       2       8       5         7       6               3           8.8   0     0       3   0                                              SS, SISC, IL, SR

Yukon Gold                        9         9       8         3               7       7       7       7       2       7       6         6       7               0           9       0     0       5   0                                              SR, GC, MS, SS

1 DAP = Days After Planting; DVK = Days to Vine Kill               

2 See NE184 Standard Potato Rating System for key to scores in Appendix 2.              

3 Percentage determined from 10 randomly selected potatoes /rep (40 total) in A and B size classes. HN=heat necrosis; HNR=average heat necrosis rating (Rating Scale: 1= very severe to 9 = absent); HH=hollow heart; VR=vascular ring discoloration; BC=brown center; SR=soft rot

4 See Appendix 2 for Comment Codes

Table 4a. Northeast Collaborators Red-Skinned Potato Variety Trial. Total and marketable yield, percentage of total yield by size class, and specific

gravity of potato clones harvested 100 DAP1 at the NCSU VGJREC/NCDA TRS, Plymouth, Washington Co., NC – 2004.

Size Dist. by Class (%)2

Total Yield                            Marketable Yield                        (% of total yield)                                1 7/8               2 1/2                                            Specific

Clone                     cwt/A                           cwt/A         % Chieftain            1’s    2’s    3’s    4’s   5’s   Cull’s           to 4″               to 4″                                                                        Gravity3

AC Red Island               136                            46                        27                  63      34    0       0       0         3                 34                    0                                                1.052

ATND98459-1Ry          173                            107                      61                  17      50    12    0       0         21              62                    12                                             1.049

B1816-5                         182                            124                      73                  31      64    2       0       0         2                 67                    2                                                1.057

B1952-2                         175                            136                      81                  19      64    14    0       0         3                 78                    14                                             1.061

B2066-3                         132                            65                        38                  50      49    1       0       0         1                 50                    1                                                1.060

B2079-6                         134                            66                        39                  50      46    3       0       0         2                 49                    3                                                1.058

Cherry Red                     99                              79                        46                  19      63    16    0       0         1                 79                    16                                             1.058

Chieftain                         243                            177                      100                16      53    20    0       0         11              73                    20                                             1.052

Dark Red Norland        149                            112                      66                  23      63    12    0       0         2                 75                    12                                             1.051

La Rouge                       204                            170                      99                  14      53    30    0       0         3                 83                    30                                             1.050

Mazama                         152                            103                      59                  30      49    18    0       0         3                 67                    18                                             1.048

Modoc                            177                            107                      62                  34      50    10    0       0         6                 60                    10                                             1.046

ND4659-5R                   149                            87                        51                  31      49    9       0       0         11              58                    9                                                1.051

ND5002-3R                   114                            76                        48                  32      51    12    0       0         6                 62                    12                                             1.054

ND6961b-1R                 118                            76                        44                  32      55    10    0       0         4                 64                    10                                             1.058

ND8082-1R                   99                              58                        33                  12      32    27    1       0         29              59                    28                                             1.027

ND8083b-1py                152                            59                        36                  62      36    2       0       0         1                 37                    2                                                1.061

ND8089-2R                   93                              56                        33                  29      48    11    0       0         12              59                    11                                             1.044

NDTX731-1R                212                            177                      100                15      51    33    0       0         2                 84                    33                                             1.042

NorDonna                      172                            56                        33                  26      30    3       0       0         41              33                    3                                                1.047

NY129                            184                            143                      84                  11      49    28    0       0         11              77                    28                                             1.045

W2-8                               84                              27                        17                  64      32    0       0       0         4                 32                    0                                                1.050

Wimena                          155                            121                      69                  18      51    28    0       0         3                 78                    28                                             1.040

Grand Mean                  152                            97

CV (%)                             20                              27

LSD (K=100)                 39.9                           33.8

1 DAP = Days After Planting; DVK = Days to Vine Kill                             

2 Size classes: 1’s < 1 7/8″; 2’s 1 7/8 to 2 1/2″; 3’s 2 1/2 to 3 1/4″; 4’s 3 1/4 to 4″; 5’s ≥ 4″; Culls = all defective potatoes.                             

3 Determined by weight in air/water method.                                   

Table 4b. Northeast Collaborators Trial Red-Skinned Potato Variety Trial. Plant vine type, disease and air pollution scores, maturity at ca. 3weeks prior to harvest,

tuber external and internal attributes of potato clones harvested 100 DAP1 at the NCSU VGJREC/NCDA TRS, Plymouth, Washington Co., NC – 2004.

       Plant Data2                                                     Tuber Data2                                                     % Internal Defects3        

Clone                       TYPE DIS  POLL MAT         CLR TXT  TCX TSS SHP EYE SIZE  DIS  APP          HN     HNR HH VR    BC                                           SR               Comments4

AC Red Island                     7       8       8         7               3       7       7       7       2       8       2         8       5               5         8.3   0     0       0     0                                                SISC, MS, SG, SR, SS

ATND98459-1Ry                6       7       8         7               3       7       7       5       2       7       3         8       4               0         9       0     0       0     3                                                ^SG, MS , SS, STST, RZ

B1816-5                               6       8       9         4               1       6       7       5       4       7       4         8       5               0         9       0     0       0     3                                                MS, ^SISC, SG

B1952-2                               6       7       8         3               1       7       5       4       4       6       5         8       6               0         9       0     3       0     3                                                SISC, RZ, MS, SG, SR

B2066-3                               5       7       8         5               2       8       6       5       2       8       2         8       7               0         9       0     0       0     5                                                SS, SISC, SR, MS, GC

B2079-6                               6       8       8         3               2       7       8       7       1       6       2         7       7               0         9       0     0       0     0                                                SR, RZ, SISC, STST

Cherry Red                           7       8       8         3               3       6       5       6       4       8       5         7       5               0         9       0     0       0     5                                                SR, SISC, RZ

Chieftain                               7       8       8         5               3       7       5       4       2       5       6         8       4               53      6.8   0     0       0     0                                                SISC, SS, ^SG

Dark Red Norland              4       8       8         2               3       7       6       7       3       7       5         8       7               0         9       0     0       0     3                                                SISC, SR, GC, SG, MS

La Rouge                             6       8       8         5               3       8       5       3       2       5       7         8       4               0         9       0     0       0     5                                                DAE, MS, DSE, SG

Mazama                               6       8       8         5               3       7       7       3       4       7       5         8       6               5         6.5   0     0       0     8                                                RZ, MS SR, SG, IL, DAE, SS

Modoc                                  6       8       8         5               3       7       7       5       2       8       5         8       6               3         8.8   0     0       0     3                                                SG, HS, SS

ND4659-5R                         6       8       8         4               2       8       7       5       2       7       4         8       6               3         8.8   0     0       0     0                                                SG, HS, SISC, SS, GC

ND5002-3R                         6       7       9         7               1       6       6       4       4       7       6         8       5               0         9       0     0       0     5                                                MS, SG, SISC

ND6961b-1R                       6       7       8         5               3/6   6       3       5       4       8       5         8       3               0         9       0     0       0     3                                                RZ, MS, PTS

ND8082-1R                         8       6       8         8               2       8       7       2       3       8       6         8       3               48      7       0     0       0     8                                                SG, MS STST, GC, RZ, AC

ND8083b-1py                      6       8       8         3               3/6   7       7       7       2       8       3         8       6               0         9       0     0       0     8                                                MS, SR      YF1

ND8089-2R                         4       8       8         3               2       7       7       6       2       8       5         8       7               3         8.8   0     0       0     0                                                SR, GC, RZ SISC, STST, MS

NDTX731-1R                      6       8       8         4               2       6       8       6       1       6       7         8       8               0         9       0     0       0     0                                                STST, SG, SR, GC

NorDonna                            6       8       8         4               3       7       7       7       1       8       5         8       3               0         9       0     0       0     0                                                ^SG, IL, MS, RZ, SR, HS

NY129                                  8       8       8         7               3       6       9       5       1       7       6         6       5               35      7.5   0     0       0     0                                                SG, RZ, IL, GC, STST

W2-8                                     5       8       9         3               2       8       6       7       1       9       2         8       6               0         9       0     0       0     0                                                SR, MS

Wimena                                6       8       8         7               2       8       7       4       3       7       7         8       6               0         9       0     0       0     0                                                MS, SISC, RZ

1 DAP = Days After Planting; DVK = Days to Vine Kill               

2 See NE184 Standard Potato Rating System for key to scores in Appendix 2.              

3 Percentage determined from 10 randomly selected potatoes /rep (40 total) in size classes 3 and 4. HN=heat necrosis; HNR=average heat necrosis rating (Rating Scale: 1= very severe to 9 = absent); HH=hollow heart; VR=vascular ring discoloration; BC=brown center; SR=soft rot

4 See Appendix 2 for Comment Codes

Appendix 1: STANDARDIZED NE184 RATING CODES FOR PLANT AND TUBER CHARACTERISTICS

 

Tuber Color                                      Tuber Texture                       Tuber Cross-section

  1. purple 1. partial russet 1. very flat
  2. red 2. heavy russet 2. —
  3. pink 3. moderate russet 3. flat
  4. dark brown 4. light russet 4. —
  5. brown 5. netted 5. intermediate/oval
  6. tan/light brown 6. slight net 6. —
  7. buff 7. moderately smooth 7. mostly round
  8. white 8. smooth 8. —
  9. cream 9. very smooth 9. very round

Tuber Skin Set                                              Tuber Shape            Tuber Eye Depth

  1. very poor 1. very round 1. –

2 —                                                                         2. mostly round                 2. deep

  1. poor 3. round to oblong 3. +

4 —                                                                         4. mostly oblong               4. –

  1. fair 5. oblong 5. medium

6 —                                                                         6. oblong to long              6. +

  1. good 7. mostly long 7. –

8 —                                                                         8. long                                  8. shallow

  1. excellent 9. cylindrical 9. +

 

Tuber Size

(GCY Scale)                                     Tuber Appearance   Tuber Disease Rating

  1. small 1. very poor 1. very severe
  2. — 2. — 2. —
  3. small-medium 3. poor 3. severe
  4. — 4. — 4. —
  5. medium 5. fair 5. moderate
  6. — 6. — 6. borderline
  7. medium-large 7. good 7. slight
  8. — 8. — 8. very slight
  9. large 9. excellent 9. none

                                                           Plant Disease and

Plant Type                                         Pollution Reaction    Maturity

  1. decumbent-poor canopy 1. Dead 1. –
  2. decumbent-fair canopy 2. – 2. early
  3. decumbent-good canopy 3. severe 3. +
  4. spreading-poor canopy 4. + 4. –
  5. spreading-fair canopy 5. moderate 5. medium
  6. spreading-good canopy 6. – 6. +
  7. upright-poor canopy 7. + 7. –
  8. upright-fair canopy 8. slight 8. late
  9. upright-good canopy 9. none 9. +

Appendix 2: COMMENT CODES FOR TABLE B

 

AC=air cracks

BR=bruise

CPB=colorado potato beetle

CS=common scab

CT=chain tubers

DAE=deep apical eyes

DSE=deep stolen end

EB=early blight

ECB= European corn borer

EL= enlarged lenticels

FS=fusarium wilt

GC=growth cracks

HI= herbicide injury

HS=heat sprouts;

IL=infected lenticels

LB=late blight

LHD=leaf hopper damage

MS=misshaped tubers

PE=pink eye

PR=pink rot

PLRV=potato leaf roll virus

PTS=very pointed tubers

PS=powdery scab

PVA, PVX, PVY=potato viruses A, X, Y

RF=red flesh (RF scale: 1=light red to 3=dark red)

RZ=Rhizoctonia

SEB=stem end browning

SC = star cracking

SG=secondary growth

SIS=silver scurf

SKN=skins

SS=sun scald

SR=soft rot

STST=sticky stolens

TSWV=Tomato Spotted Wilt Virus

VW=Verticillium wilt

WSTD=weak stand

WW=wire worm

YF=yellow flesh (YF scale: 1=light yellow to 3=dark yellow)

Note: ^ before code = high levels; ^^ = very high; ~ = moderate or some

Was the information on this page helpful? Yes check No close