BC0038-1 had a nice plant type, good vigor, and attractive tubers. Its maturity
appears to be earlier than Russet Burbank. This entry, C08011-5, and AC77101-
1 ...
14 Statewide and Western Regional Potato Seedling Screening Trials at the Klamath Experiment Station K.A. Rykbost and J. Maxwelll
INTRODUCTION The Oregon Potato Variety Development Program presently screens approximately 80,000 first-generation seedlings. Survivors of the first two levels of selection at Hermiston, Powell Butte, or Ontario are advanced to replicated yield trials. The KES participates in the program from this point forward. In 1988 KES conducted five individual trials as part of the statewide variety selection program. The KES program was modified in 1988 to strengthen the total effort. For the first time a Western Regional Trial was conducted at KES. This trial is the final step in selection of advanced lines prior to official release. Entries are included from several states and trials are conducted at 10 to 12 locations in the western states. An experiment was conducted to determine whether alternative screening procedures would improve the efficiency of the selection process. Larger plot size and a greater volume of samples for grading were used in all trials to improve experimental precision.
PROCEDURES All variety screening trials were conducted in a randomized complete block design. Cultural practices and other conditions that varied between individual experiments will be discussed separately for each trial. All trial areas were fumigated with 15 gpa of Telone II applied on April 15. Herbicides included Eptam applied at 3.5 lb ai/A on June 7, and metribuzin applied aerially at 0.30 lb ai/A on July 5. Insect control practices included aldicarb banded with fertilizer at 3.0 lb ai/A at planting, methamidophos applied aerially at 0.75 lb ai/A in combination with Ridomil - MZ at 2.0 lb/A on July 22, and methamidophos applied aerially at 0.5 lb/A in combination with Duter at 20 oz/A on August 23. Vines were desiccated with diquat applied at 1.5 pints/A on September 6 and shredded with a rotobeater several days prior to harvest.
1 / Superintendent/Associate Professor, Experimental Biology Technician, respectively, Klamath Experiment Station.
Acknowledgements: Partial funding for variety development programs by the Oregon Potato Commission, the Cooperative State Research Service (USDA), the Agricultural Research Service, and Plant Genetics, Inc. is gratefully recognized.
15 Potatoes were planted with a two-row assisted feed planter using 32inch row spacing. All trials received 800 lb/A of 16-20-0-13 fertilizer banded on both sides of rows at planting. Seed was hand-cut to 1.5 to 2.0 ounce size, treated with thiophanate-methyl at 0.50 lb/cwt, and suberized for 10 to 14 days prior to planting. Trials received 1.7 inches of rainfall and 18.0 inches of irrigation water during the season. Irrigation was applied with solid-set sprinklers on a 40 foot x 48 foot spacing, twice weekly, to replenish 65-90 percent of pan evaporation, depending on growth stage. Potatoes were harvested with a one-row digger-bagger. Total weights of all tubers were determined in the field. Samples were tagged and stored until grading was done in October and November. Specific gravity was determined on a 10 pound sample of 6 to 10 ounce No. 1 grade tubers by the weight-in-air weight-in-water method. Internal defects were observed by cutting the 10 largest tubers in each sample. Yields of No. l's were not adjusted for surface blemishes such as scab or nematodes, or for internal defects such as hollow-heart or spraing (corky ring spot). Statistical analyses of data were performed with MSU Stat software. • RESULTS AND DISCUSSION
Preliminary Yield Trial Eighty-five numbered selections, three seed lots of Russet Burbank and four other named varieties were planted at 12-inch seed spacing on May 17. Three replications included one with 8 hills per entry and two with 12 hills per entry. Fertilizer applied at planting was supplemented with 100 lb N/A applied as solution 32 and incorporated with a rolling cultivator on June 7. Plots were harvested on September 27 and all tubers were saved for grading. Plant stands and canopy vigor were generally excellent and yields and tuber type were quite good. Nematode damage was fairly widespread in these and other KES trials. Root-knot nematode damage affected nearly all tubers in some plots. Spraing was observed in up to 40 percent of cut tubers. The 1988 season was favorable for nematodes of various species and control measures applied were less than satisfactory. Hollow-heart was also observed frequently but was generally confined to the oversize tubers. Russet Burbank performance was similar for the standard Powell Butte seedlot and nuclear seed (clone-39) from the Oregon Foundation Seed Project (Tables 1 and 2). A G-IV commercial seed source of Russet Burbank produced a 30 percent higher yield of No. l's in this trial. Yukon Gold was far superior to Yellow Finn. HiLite was not outstanding in yield but demonstrated nice appearance and a high percentage of No. 1 tubers. Several outstanding lines were identified in the trial. The best entry was A084180-1. Other promising selections included A084183-1, A084175-6, ND02904-1, and C0084206-2. All of these entries have been promoted to the
Statewide Trial for further evaluation in 1989.
16 Performance of selections at the four statewide locations was quite varied. Using only the ranking in total yield as a criterion, the best entry at KES (A084180-1) ranked 6, 11, and 41 at other sites. Ontario's top-yielder ranked 14, 87, and 21 at Hermiston; Powell Butte, and KES, respectively. This illustrates the importance of screening material at each location. Twenty-four of the entries were advanced to the Statewide Trial for 1989. They included 12 out of the top 20 in yield of No. l's at KES. It is interesting to note that Russet Norkotah was the male parent for 25 percent of the lines promoted and 20 percent of the lines entered in the trial. Oregon Statewide Trial A total of 55 entries were planted on May 18, including 43 numbered lines tested at all sites, and several advanced selections and named varieties evaluated only at KES. Thirty-hill plots at 12-inch seed spacing were replicated four times. Nitrogen, applied at 100 lb N/A as solution 32 on June 7, supplemented banded fertilizer. Plots were harvested on October 3. Approximately 50-pound samples were saved from each plot for grading and specific gravity determination. Crop performance was similar to that observed in the Preliminary Yield Trial. All Russet Burbank seed sources ranked very low in yield of No. l's (Table 3). The G-IV commercial source yielded less than Powell Butte or clone-1 sources in this trial. All Russet Burbank lots were considered rough and unattractive (Table 4). HiLite and Norgold yields were very similar to those observed in the Preliminary Yield Trial. Russet Norkotah was equivalent in yield to Norgold and slightly better than A7411-2 and A74114-4, both of which are being considered for release in the near future. A74212-1 was the outstanding entry in this trial at KES and at the other locations. Yield of No. l's was ranked in the top three for both clones at all four locations. Performance of this selection at KES over several years will be summarized later in this report. The screening line A081178-12 was an excellent lot at KES and ranked quite high at other locations. It is being retained in this trial for 1989. A083110-3, A083037-10, and A083119-3 performed well at KES and were promoted to the Tri-State Trial along with entry numbers 9, 16, 18, and 41. A081216-1 will advance to the Western Regional Trial, but ranked very low at KES. Statewide Chipping Five named varieties and five potential chipping selections were planted on May 18. Individual plots were one row, 30 feet long with seed spaced at 8.7 inches, replicated four times. Banded fertilizer was supplemented with 50 lb N/A as solution 32, applied on June 7. Plots were harvested on September 29. Approximately 60-pound samples were saved from each plot for grading and specific gravity determination. A 10-pound sub-
sample was delivered to Corvallis for evaluation of chip color.
17 Norchip has been the local standard for a small volume of chip stock grown for early fall delivery. Atlantic was superior to Norchip in yield, solids content,and color (Tables 5 and 6). Monona had higher yields than Atlantic but very low solids, a serious deficiency for chip processing. Kennebec produced high yields but had excessive size. BR7093-24 and ND2382-4 were the best numbered selections. BR7093-24 will be released by Idaho in 1989 under the tentative name of Gemchip. This selection and Atlantic appear to be promising candidates for a small but growing market for. Klamath Basin crops. BR7093-24 will be evaluated for response to cultural management practices in 1989. Western Regional Trial Entries, including seven named varieties and 13 numbered selections, were planted on May 19 in 30-hill plots at 12-inch seed spacing with four replications. An application of 100 lb N/A as solution 32 on June 7 supplemented banded fertilizer. The potatoes were desiccated with diquat on September 12 and harvested on September 28. Approximately 60tpound samples were saved for grading and specific gravity determination.
Russet Burbank benefitted from the additional length of growing season compared with Preliminary and Statewide Trials, achieving a higher yield in this trial (Table 7). The outstanding russeted selection was A74114-4, which is being considered for release by Idaho in 1990. This selection has maturity similar to Norgold (Table 8), excellent appearance, and would have achieved higher yields at a more appropriate planting density and fertilization rate. It will be evaluated for response to nitrogen rates and seed spacing in 1989. Red Lasoda produced an exceptionally high yield but had excessive size and poor appearance. NDTX9-1068-11R had good shape and skin color for a red, but experienced severe skinning damage in harvest, as did SH-1. The SH-1 selection from Plant Genetics, Inc., produced a significantly higher yield than its sister line, Shepody; however, it has very late vine maturity and is probably not suited to local climatic conditions. Sierra and Cal Gold are both of interest locally for seed production for the Bakersfield, California, area. Cal Gold produced a high yield of large tubers but also had fairly high percentages of No. 2's and culls. Sierra had very poor early season vigor which undoubtedly reduced yields. ND840-1 has excellent type and has demonstrated good storability; however, low yields and low solids combined with late maturity indicate that this seedling may not hold promise for the region. Out of ten selections entered for testing at all locations (A7816-4 through AC77226-13), only one demonstrated excellent appearance at KES. BC0038-1 had a nice plant type, good vigor, and attractive tubers. Its maturity appears to be earlier than Russet Burbank. This entry, C08011-5, and AC77101-1 have been selected for seed increase in Colorado and will remain in the trial. AC79100-1, AC80369-1, and AC77226-13 are being discarded. 'Washington will continue working with C008014-1, which has
graduated from this trial. The other entries will be retained for further evaluation.
18 This trial will be continued at KES if seed availability is sufficient. In the future an 8.7-inch seed spacing will be used and nitrogen fertilizer rates will be reduced by about 25 percent. This will enhance performance of most of the entries. New varieties from other North American breeding and selection programs that may be of interest locally will be included if possible.
Seedling Screening Procedure Trial Russet Burbank and five entries from the Oregon Statewide Trial were planted on May 18. Individual plots were two rows, 30 feet long with four replications. Seed spacing was 8.7 inches, and supplemental fertilizer was Vines were desiccated on applied at 50 lb. N/A as solution 32 on June 7. Plots were September 6, at the same time as the Oregon Statewide Trial. harvested on September 29. All tubers were saved and graded from both rows of each plot. The objective of this experiment was to determine whether larger plot and sample size, and different cultural management practices, would change the conclusions of potato selection screening trials. This trial used double the plot size, and four times greater sample size for grading than the Oregon Statewide Trial. Planting density was 40 percent greater and nitrogen rate was reduced by 50 lb N/A to more nearly represent cultural management requirements of varieties with lower tuber set and earlier maturity than Russet Burbank. In 1987 Preliminary and Statewide trials each of the five selections exceeded Russet Burbank yield of No. l's by over 50 percent, and had a relatively high percentage of 10 ounce tubers (Table 9). A083037-10 and A082616-18 exhibited poor shape in large tubers. This characteristic usually leads to discarding selections even though the Russet Burbank standard may show similar problems. The relative merits of the five selections varied between trials in 1988. A083010-7 produced a higher yield with better size distribution in the Oregon Statewide Trial at 12-inch spacing and a high nitrogen rate. A083019-10 and A083037-10 were similar in both trials except that the latter showed better type at the higher planting density and lower nitrogen rate. A083196-15 performed substantially better at higher density and a lower nitrogen rate. A082616-18 had similar yields under both management regimes, with slightly better size distribution at higher density and a lower nitrogen rate. Russet Burbank experienced a large increase in small tubers at the closer seed spacing. Experimental precision was improved slightly by increasing plot size and sample volume; however, differences were insufficient to justify the large increase in effort and cost associated with this change in procedures.
19
SUMMARY AND CONCLUSIONS Several outstanding selections were identified at each screening level in the Oregon and western regional programs. The majority of entries at early stages demonstrate higher yields than Russet Burbank, some by very large margins. Oregon's selection program includes a number of very attractive russeted selections which could become leading contenders to replace a portion of the Russet Burbank acreage in less than 10 years. In the short term A74212-1 appears to be a good selection for fresh market production in the Klamath Basin. The A74114-4 selection has excellent potential for an early fresh market russet. Preliminary tests suggest this seedling has better culinary quality than Russet Norkotah. BR7093-24 and Atlantic may find a place as chipping varieties in a local market that has considerable growth potential. Each of these lines need to be evaluated in more detail to determine their management requirements. Large differences in seedling performance between the four trial locations in Oregon emphasize the importance of conducting the trials at The Western Regional Trial is the only opportunity for local evalKES. uation of advanced lines from out-of-state programs. Including it in the KES program is highly desirable for the future. In past years the screening trials were conducted at KES using 15-hill plots and cultural practices considered optimum for Russet Burbank. In 1988 trials, 30-hill, or larger, plots improved experimental precision substantially. An increase in planting density and reduction in nitrogen rate will result in improved performance for most varieties and selections other than Russet Burbank. These changes will be incorporated in future screening trials beyond the Preliminary Yield Trial level.
20
Table 1. Tuber yield by grade for entries in the Preliminary Yield Trial, Klamath Experiment Station, 1988.
ENTRY NO. SELECTION
4-6 oz
6-10 oz cwt/A-
U.S. NO. 1'S >10 oz
B's
cwt/A
TOTAL RANK
%
No 2's -cwt/A
TOTAL cwt/A
YIELD RANK
Russet Burbank Yukon Gold Norgold HiLite NDO 2845-1
110 55 57 71 98
124 122 145 154 239
49 216 188 121 48
283 392 390 346 386
76 25 26 49 28
75 94 83 90 82
53 17 27 34 69
18 10 19 0 10
375 419 468 385 473
58 41 25 57 23
6. 7. 8. 9. 10.
NDO NDO NDO NDO NDO
2848-8 2863-6 2864-1 2871-1 2872-1
229 129 136 48 155
134 189 173 133 114
17 62 40 283 34
379 380 349 464 303
34 32 47 11 64
75 81 86 90 82
102 76 57 21 61
17 9 0 26 8
506 470 408 514 371
15 24 48 13 64
11. 12. 13. 14. 15.
NDO 2876-1 NDO 2876-3 Yellow fin NDO 2904-1 NDO 2904-6
146 169 119 74 75
137 62 96 133 116
40 0 0 300 278
323 232 214 507 469
57 85 89 4 10
80 73 48 89 93
55 88 88 25 18
10 0 91 27 10
406 319 447 567 507
49 84 31 4 14
16. 17. 18. 19. 20.
NDO NDO NDO NDO NDO
2904-7 2952-1 2962-7 2965-4 2971-1
70 96 110 152 110
157 77 135 133 145
161 4 98 3 154
387 177 343 289 409
27 90 50 71 21
93 69 82 74 86
25 55 31 95 39
0 17 15 0 22
415 257 417 389 473
44 91 43 56 21
21. 22. 23. 24. 25.
NDO NDO NDO NDO COO
2976-3 3003-3 3056-3 3057-2 84088-1
88 45 61 152 64
69 112 169 214 113
0 206 199 123 116
157 363 430 489 293
92 38 17 7 70
61 80 95 90 83
101 20 13 57 22
0 55 10 0 29
257 452 453 545 353
92 29 28
26. 27. 28. 29. 30.
COO COO COO COO COO
84115-1 84116-1 84159-4 84171-2 84171-3
111 187 88 78 57
152 141 166 159 123
117 26 60 122 103
329 354 298 360 283
54 45 66 41 77
89 81 88 86 96
42 78 17 34 12
0 2 13 24 0
371 435 337 418 296
63 36 77 42 87
31. 32. 33. 34. 35.
COO 84205-2 COO 84206-2 COO 64254-2 COO 84300-2 AO 84026-1
72 80 104 85 77
117 239 97 106 158
66 170 14 109 89
255 489 216 300 324
82 6 88 65 56
89 86 75 88 89
29 49 60 16 31
0 27 4 11 0
285 566 287 340 363
90 5 89 76 67
36. 37. 38. 39. 40.
AO AO AO AO AO
84040-1 84050-2 84060-8 84071-2 84107-1
121 98 113 96 44
224 214 166 153 137
69 41 91 68 230
413 353 370 317 410
19 46 35 60 20
86 87 86 88 93
61 54 51 34 27
0 1 5 9 0
479 408 432 361 441
20 47 38 69 33
41. 42. 43. 44. 45.
AO AO AO AO AO
84134-1 84136-2 84154-1 84154-2 84164-4
78. 94 61 97 170
173 138 171 127 188
120 65 115 170 38
370 297 347 394 396
36 67 48 24 23
89 89 82 75 81
20 35 30 30 87
12 0 34 3 4
414 333 423 522 489
45 79 40 12 19
46. 47. 48. 49.
AO AO AO AO
84168-1 84170-1 84172-2
85 162 120
178 233 140
230 67 27
494 462 286
5 12 75
92 87 78
25 60 65
3 0 7
84172-3
98
191
92
381
31
86
46
7
539 532 365 441
50.
AO 84172-4
173
9 10 66 34
116
7
295
68
74
83
0
398
52
1. 2. 3. 4. 5.
.
8
72
21
Table 1.(cont'd) Tuber yield by grade for entries in the Preliminary Yield Trial, Klamath Experiment Station, 1988.
ENTRY NO. SELECTION
4-6 oz
6-10 oz cwt/A
U. S. No. l's >10 oz
cwt/A
TOTAL RANK
%
B's No 2's -cwt/A
TOTAL cwt/A
YIELD RANK
51. 52. 53. 54. 55.
AO 84172-6 AO 84175-6 AO 84177-2 AO 84180-1 AO 84180-2
155 84 153 79 100
179 288 176 256 166
46 138 34 258 157
380 510 363 592 423
33 3 37 1 18
85 91 78 96 92
44 25 72 27 34
18 11 14 0 0
447 558 468 619 460
30 6 26 1 27
56. 57. 58. 59. 60.
AO 84183-1 AO 84190-1 AO 84190-2 AO 84209-5 AO 84217-1
100 131 99 117 123
258 145 193 151 150
163 35 168 72 111
521 310 459 340 385
2 63 13 51 29
89 83 94 84 87
52 47 30 47 43
3 14 0 8 10
587 374 489 404 445
2 60 18 51 32
61. 62. 63. 64. 65.
AO 84217-4 AO 84217-5 AO 84223-1 AO 84276-3 AO 84276-4
76 68 82 104 117
84 143 150 120 128
62 103 128 65 42
221 313 361 289 288
86 62 39 72 74
70 84 83 86 88
14 22 22 41 40
40 24 29 4 0
316 374 436 337 327
85 59 35 78 82
66. 67. 68. 69. 70.
AO 84303-2 AO 84311-2 AO 84327-2 AO 84327-3 AO 84345-1
90 57 113 131 90
115 126 160 44 135
50 172 125 0 36
255 355 398 175 262
81 44 22 91 80
78 91 84 50 85
58 12 45 174 45
10 7 12 0 0
327 391 473 349 309
83 54 22 73 86
71. 72. 73. 74. 75.
AO 84355-1 AO 84355-2 AO 84364-4 AO 84364-10 AO 84364-11
133 89 101 115 90
130 179 100 99 146
30 115 77 3 125
293 383 277 217 361
69 30 78 87 40
82 90 80 66 89
52 28 64 113 37
11 12 5 0 0
358 426 346 330 404
70 39 74 81 50
76. 77. 78. 79. 80.
AO 84366-4 AO 84366-10 AO 84377-6 COO 84026-201 COO 84055-205
106 66 21 159 68
206 150 145 212 90
123 118 314 103 157
435 334 480 474 315
16 52 8 9 61
83 91 82 86 84
27 17 15 49 22
59 9 41 18 5
526 368 585 553 373
11 65 3 7 61
81. 82. 83. 84. 85.
COO 84056-201 COO 84056-202 COO 84056-203 AO 84408-203 AO 84418-202
58 65 65 74 137
113 142 115 135 109
118 150 58 116 0
289 356 238 326 245
73 43 84 55 83
88 96 80 83 71
20 10 55 30 99
5 4 0 10 2
330 371 296 391 346
80 62 88 55 75
86. 87. 88. 89. 90.
AO 84427-203 AO 84428-203 AO 84439-205 AO 84439-208 AO 84441-212
73 117 120 93 83
158 171 197 184 129
33 154 41 44 110
264 442 358 321 322
79 15 42 59 58
74 89 87 82 89
53 46 49 53 37
21 0 0 3 3
355 496 410 393 362
71 17 46 53 68
91. 92.
R.B.-Clone 39 R.B.-Gen. IV
142 167
157 224
64 58
329 449
14
76
68 _51
_2
0
435 505
15
AVERAGE CV (%) LSD(.05)
102 33 55
151 32 78
98 52 82
351 19 106
84
46 43 32
11 151 26
417 16 107
53
a2
37
22
Table 2. Performance of entries in the Preliminary Yield Trial, Klamath Experiment Station, 19 ENTRY NO. 1. 2. 3. 4. 5.
SELECTION Russet Burbank Yukon Gold Norgold HiLite NDO 2845-1
STAND
SPECIFIC GRAVITY
N.H., % 1
TYPE2
COLOR3
COMMENTS
97 84 97 84 88
1.086 1.088 1.068 1.073 1.080
13 13 40 20 0
4-5 3 5 5 3
4 2 4 4 2
CRS Ne, Rz. Ne, Nice Ne, Nice Ne
97 100 100 94 97
1.084 1.085 1.077 1.078 1.067
0 23 17 0 13
3 5 5 5 4
2 4 4 4 4
Ugly, IBS Ne, Tearddrops Rz. Nice, Smooth. Pointy
6. 7. 8. 9. 10.
ND0 NDO NDO ND0 NDO
11. 12. 13. 14. 15.
NDO 2876-1 ND0 2876-3 Yellow Finn NDO 2904-1 NDO 2904-6
97 100 100 97 94
1.077 1.069 1.085 1.076 1.068
0 7 0 0 0
5 3 2 4 5
4 4 2 4 4
Ne, Rz., Knobs Ne, small Ugly, poor Nice Ne, big
16. 17. 18. 19. 20.
ND0 NDO ND0 NDO NDO
2904-7 2952-1 2962-7 2965-4 2971-1
69 97 97 100 81
1.065 1.062 1.082 1.091 1.080
23 7 50 7 7
5 3 5 3 5
4 4 4 2 4
Very nice Ugly Growth cracks Ne, IBS Ne, IBS
21. 22. 23. 24. 25.
NDO NDO NDO NDO COO
2976-3 3003-3 3056-3 3057-2 84088-1
94 97 100 97 97
1.070 1.072 1.084 1.065 1.081
13 73 0 13 17
5 4 5 5 4
4 4 4 4 4
Small, poor Ne, ugly Ne, nice Rz., Ne
26. 27. 28. 29. 30.
COO COO COO COO COO
84115-1 84116-1 84159-4 84171-2 84171-3
97 100 100 88 78
1.080 1.089 1.072 1.081 1.074
0 13 33 33 90
5 5 5 4 5
4 4 4 4 4
Ne Teardrops Ne, IBS Teardrops Big, nice Ne, poor shape
31. 32. 33. 34. 35.
COO 84205-2 COO 84206-2 COO 84254-2 COO 84300-2 AO 84026-1
94 94 97 97 97
1.071 1.079 1.078 1.090 1.087
0 0 0 53 7
5 4 5 4 5
4 4 4 5 5
Ne, nice Ne, nice Teardrops, poor Teardrops, growth crac
36. 37. 38. 39. 40.
AO AO AO AO AO
84040-1 84050-2 84060-8 84071-2 84107-1
94 91 91 97 94
1.069 1.091 1.075 1.091 1.072
0 0 7 13 7
5 3 5 5 5
4 4 4 4 4
Rz. Poor Rz., nice Very nice
41. 42. 43. 44. 45.
AO AO AO AO AO
84134-1 84136-2 84154-1 84154-2 84164-4
100 88 91 ,94 97
1.081 1.076 1.080 1.071 1.085
23 20 37 13 57
5 5 5 5 5
4 4 5 4 4
Nice Rz., Ne Bad cracks, scab Ugly Rot, V.D.
46. 47. 48. 49. 50.
AO 84168-1 A0.84170-1 AO 84172-2 AO 84172-3 AO 84172-4
94 100 97 97 100
1.076 1.085 1.089 1.088 1.074
57 7 27 33 0
5 5 5 5 4
4 4 4 4 4
Ne Ne Ne Ne, Rz. Rz., poor
2848-8 2863-6 2864-1 2871-1 2872-1
23
Table 2. (cont'd) Performance of entries in the Preliminary Yield Trial, Klamath Experiment Station, 1988. STAND
SPECIFIC GRAVITY
H.H. % 1
97 97 100 100 97
1.090 1.099 1.086 1.087 1.095
13 67 20 23 13
5 5 5 5 5
4 4 4 4 5
Teardrops, Rz. Rz., very nice Rz., nice, smooth
AO 84183-1 AO 84190-1 AO 84190-2 AO 84209-5 AO 84217-1
97 91 100 100 97
1.084 1.080 1.076 1.067 1.093
57 7 40 0 20
5 5 5 5 5
4 4 4 5 4
Ne, Rz., knobs Ne, pointy, poor Rz., very nice Very nice, smooth Big
61. 62. 63. 64. 65.
AO 84217-4 AO 84217-5 AO 84223-1 AO 84276-3 AO 84276-4
88 100 100 84 75
1.089 1.078 1.070 1.070 1.071
63 0 7 7 7
5 4 4 4 5
4 4 4 4 4
Ugly Rz., Ne, IBS, poor Bad growth cracks Ne, poor shape Ne, IBS
66. 67. 68. 69. 70.
AO 84303-2 AO 84311-2 AO 84327-2 AO 84327-3 AO 84345-1
94 97 100 100 94
1.089 1.075 1.073 1.075 1.076
0 23 13 0 13
5 5 5 5 5
4 4 4 4 4
Ne, nice Knobs, nice Cracks, knobs Small Nice
71. 72. 73. 74. 75.
AO 84355-1 AO 84355-2 AO 84364-4 AO 84364-10 AO 84364-11
91 94 91 100 91
1.076 1.088 1.075 1.074 1.077
0 0 63 0 37
5 5 5 5 5
4 4 4 4 4
Ne Nice, smooth Pointy Small, smooth Rz., Ne, smooth
76. 77. 78. 79. 80.
AO 84366-4 AO 84366-10 AO 84377-6 COO 84026-201 COO 84055-205
100 97 100 97 78
1.081 1.072 1.084 1.076 1.091
'20 70 87 0 43
5 5 4 3 5
4 4 4 3 3
Ne Scab, nice shape Pointy, knobs Rz., Ne, poor Ne, nice
81. 82. 83. 84. 85.
COO 84056-201 COO 84056-202 COO 84056-203 AO 84408-203 AO 84418-202
72 88 94 100 97
1.080 1.081 1.071 1.085 1.112
60 33 33 7 0
5 3 5 5 5
5 4 5 4 3
Ne, scab Ne Nice, smooth Ne, knobs Ne, smooth
86. 87. 88. 89. 90.
AO 84427-203 AO 84428-203 AO 84439-205 AO 84439-208 AO 84441-212
91 100 97 100 94
1.096 1.090 1.086 1.069 1.070
50 0 13 43 43
5 5 5 5 5
4 3 4 3 4
Rz. IBS, scab Rz., poor shape Knobs, poor lot Ne
91. 92.
R.B. - Clone 39 R.B. - Gen. IV
97 100
1.086 1.087
13 0
4 5
4 4
IBS, Ne, Rz. Ne, poor
ENTRY NO.
SELECTION
51. 52. 53. 54. 55.
AO 84172-6 AO 84175-6 AO 84177-2 AO 84180-1 AO 84180-2
56. 57. 58. 59. 60.
1/ H.H. - hollow heart - percent in ten largest tubers/sample 2/ TYPE - 1-pointed, 2-flat, 3-round, 4-long, 5-blocky 3/ COLOR - 1-red, 2-white, 3-buff, 4-brown, 5-dark brown
TYPE 2
COLOR3
COMMENTS
Ne -showing Nematode blemish IBS -Internal Brown Spot CRS -Corky Ring Spot Rz. -Rhizoctonia V.D.-Vascular Discoloration
24 Table 3. Tuber yield by grade for entries in the Oregon Statewide Trial, Klamath Experiment Station, 1988.
ENTRY SELECTION NO
4-6 oz
6-10 oz cwt/A
U. S. No. l's TOTAL >10 oz cwt/A RANK
B's %
No 2's cwt/A
TOTAL cwt/A
YIELD RANK
1. 2. 3. 4. 5.
R. Burbank Lemhi Norgold Norkotah A74212-1E
140 40 117 96 108
137 113 180 172 226
42 266 86 115 239
320 419 384 383 573
49 14 30 32 1
69 .83 93 87 92
89 19 27 30 18
37 43 0 19 27
463 507 415 441 626
36 11 44 40 1
6. 7. 8. 9. 10.
A74212-11. A081178-12 A081216•1 A081362•3 A082254-24
98 71 119 115 93
192 173 133 166 180
. 225 249 62 136 126
514 494 315 417 398
2 3 51 15 25
90 92 83 84 85
22 14 52 45 37
19 22 11 25 25
568 537 381 495 471
2 5 49 14 27
11. 12. 13. 14. 15.
A082260-8 A082281-1 A082283-1 A082611-7 A082616-18
105 77 71 118 116
184 164 142 144 185
112 189 164 112 88
401 430 377 373 389
23 11 34 35 28
85 91 80 80 86
38 28 36 63 51
24 10 50 25 10
470 470 474 466 454
30 29 26 34 39
16. 17. 18. 19. 20.
00083008-1 00083020-5 00083021-1 00083021-5 00083023-9
70 66 49 40 62
157 130 113 52 99
182 124 236 118 69
408 321 398 210 230
21 47 26 55 54
89 75 85 66 78
28 21 14 17 28
19 68 43 61 24
457 427 469 320 296
38 42 32 54 55
21. 22. 23. 24. 25.
00083066-1 00083067-3 00083085-5 00083120-5 00082177-3
63 72 81 73 101
176 154 163 108 179
163 187 166 142 131
402 412 410 322 412
22 17 19 46 16
81 85 90 77 83
33 24 35 36 48
48 42 11 41 19
497 487 457 418 495
13 21 37 43 15
26. 27. 28. 29. 30.
A083005-1 A083010-7 A083019-10 A083026-3 A083029-8
86 124 71 161 79
146 188 199 181 139
124 121 157 41 139
356 433 427 384 356
40 9 12 29 39
91 82 91 78 74
21 36 32 55 19
7 61 6 24 90
391 531 470 490 487
48 6 28 18 23
25
Table 3.(cont'd) Tuber yield by grade for entries in the Oregon Statewide Trial, Klamath Experiment Station, 1988.
ENTRY NO. SELECTION
4-6 oz
6-10 oz cwt/A
U. S. No, l's >10 oz TOTAL cwt/A RANK
%
B's No 2's -cwt/A
TOTAL cwt/A
YIELD RANK
31. 32. 33. 34. 35.
A083037-6 A083037-10 A083065-2 A083088-2 A083093-2
111 89 131 103 97
152 164 123 157 134
106 216 32 136 206
369 469 285 397 437
36 5 53 27 8
77 85 77 82 88
70 30 56 41 22
37 50 18 33 32
479 555 372 482 498
2 3 51 22 12
36. 37. 38. 39. 40.
A083110-3 A083119-2 A083119-3 A083148-1 A083177-5
86 84 72 112 111
173 125 138 177 170
219 174 233 110 130
479 383 443 400 410
4 31 7 24 18
87 74 85 86 83
25 40 29 36 39
34 64 45 26 46
551 520 521 465 495
4 8 7 35 16
41. 42. 43. 44. 45.
A083177-6 A083196-12 A083196-15 A083206-2 A083218-10
134 69 92 34 71
190 93 147 81 183
98 163 171 205 194
423 325 409 320 448
13 44 20 50 6
86 79 88 92 92
46 40 36 12 28
13 41 21 15 10
490 414 467 348 489
17 46 33 53 20
46. 47. 48. 49. 50.
A083222-6 A083222-7 A081323-4 A081323-20 HiLite
104 56 54 69 107
191 140 103 147 168
135 183 162 138 57
431 379 321 353 332
10 33 48 42 43
85 87 78 85 88
43 30 20 44 35
29 24 52 18 7
508 435 413 416 376
10 41 47 45 50
51. 52. 53. 54.
Shepody R.B. Cl 1 R.B. G.IV A7411-2
47 130 112 62
82 177 148 121
231 47 42 173
360 355 301 356
37 41 52 38
77 70 63 73
29 60 78 32
77 68 47 88
470 510 476 490
31 9 25 19
89 29 36
150 23 48
146 35 72
385 17 91
83
36 39 19
33 63 '29
464 13 85
55.
A74114-4 AVERAGE CV(%) LSD(.05)
55
116
154
325
45
88
19
19
368
52
26
Table 4. Performance of entries in the Oregon Statewide Trial, Klamath Experiment Station, 1988. ENTRY NO SELECTION
STAND %
VIGOR, RATING'
SPECIFIC H.H., GRAVITY % 2
TYPES
COLOR 4
COMMENTS 5
1. 2. 3. 4. 5.
R. Burbank Lemhi Norgold Norkotah A74212-1E
96 89 93 93 93
1.8 2.0 1.0 1.3 1.5
1.085 1.085 1.071 1.068 1.079
15 58 30 0 0
5 5 5 5 5
4 4 4 4 4
CRS, tapered, ugly CRS, knobs, ugly CRS Nice CRS, nice
6. 7. 8. 9. 10.
A74212-1L A081178-12 A081216-1 A081362-3 A082254-24
97 85 95 96 85
2.8 2.0 2.0 1.8 1.8
1.081 1.091 1.083 1.082 1.083
0 30 30 5 5
4 5 5 5 5
4 4 4 3 4
CRS CRS, nice CRS, scab CRS, Rz., nice Tapered, ugly
11. 12. 13. 14. 15.
A082260-8 A082281-1 A082283-1 A082611-7 A082616-18
92 97 83 95 96
1.0 1.8 2.0 1.5 1.0
1.086 1.081 1.086 1.089 1.092
25 25 15 5 35
5 4 5 4 5
4 5 4 4 4
IPS CRS, very nice
16. 17. 18. 19. 20.
00083008-1 C0083020-5 00083021-1 C0083021-5 00083023-9
93 86 98 87 83
1.8 2.0 2.5 1.8 1.8
1.088 1.086 1.091 1.088 1.082
5 25 65 88 15
5 5 5 4 5
4 4 3 4 4
Nice Cracks, ugly
21. 22. 23. 24. 25.
00083066-1 C0083067-3 00083085-5 00083120-5 C0082177-3
93 93 93 77 90
2.0 1.5 2.5 1.8 1.0
1.088 1.076 1.080 1.087 1.075
43 0 10 45 43
5 5 5 5 3
4 3 4 4 1
Nice CRS, tapered, knobs
26. 27. 28. 29. 30.
A083005-1 A083010-7 A083019-10 A083026-3 A083029-8
93 97 97 97 88
1.3 1.5 1.0 1.3 1.3
1.092 1.084 1.075 1.084 1.074
28 35 0 0 0
5 5 5 5 4
4 4 4 4 4
CRS CRS, crooked CRS, nice Bad CRS, knobs, ugly Bad CRS, cracks, crooked
CRS, Rz. CRS
Knobs, ugly Cracks
Tapered CRS, nice red
27
Table 4. (cont'd) Performance of entries in the Oregon Statewide Trial, Klamath Experiment Station, 1988. ENTRY NO SELECTION
STAND VIGOR SPECIFIC H.H 4 % RATING' GRAVITY %
TYPES COLOR 4 COMMENTS 5
31. 32. 33. 34. 35.
A083037-6 A083037-10 A083065-2 A083088-2 A083093-2
93 86 98 96 96
2.3 2.0 1.0 1.5 1.0
1.089 1.078 1.081 1.075 1.067
20 20 0 68 0
4
36. 37. 38. 39. 40.
A083110-3 A083119-2 A083119-3 A083148-1 A083177-5
97 87 95 83 94
1.8 2.0 1.5 1.8 1.0
1.079 1.083 1.086 1.084 1.087
41. 42. 43. 44. 45.
A083177-6 A083196-12 A083196-15 A083206-2 A083218-10
98 86 89 96 90
1.8 2.0 1.0 2.0 2.0
46. 47. 48. 49. 50.
A083222-6 A083222-7 A081323-4 A081323-20 HiLite
96 95 98 93 96 94 100 98 96 98
51. 52. 53. 54. 55. 1/ 2/ 3/ 4/ 5/
Shepody R.B. Cl 1 R.B. G.IV A7411-2 A74114-4
5 5
Tapered SEB, cracks CRS, long-skinny
5 5
4 4 4 4 4
70 5 5 15 25
5 5 5 5 5
4 4 4 5 4
CRS Cracks, ugly, rough Nice Odd shape CRS, tapered
1.083 1.083 1.074 1.081 1.084
5 40 15 28 83
5 5 5 5 4
4 4 5 4 4
Cracks,-CRS CRS, Nice Very nice Thumbnail cracks
2.0 2.0 1.0 1.0 1.0
1.083 1.082 1.086 1.086 1.073
43 35 13 20 0
5 5 4 5 5
4 4 4 4 4
Rough CRS, nice CRS, cracks, knobs CRS
1.3 1.5 1.5 1.8 1.0
1.082 1.083 1.084 1.086 1.078
15 10 8 5 10
4 4 5 4 5
2 4 4 5 4
CRS, rough, ugly Cracks, rough, ugly Rough, ugly CRS, long, odd shapes CRS, nice
.
Nice
Vigor rating - September 21, Scale: 1 (completely dead) - 5 (completely green) H.H. - Hollow Heart - percent in ten largest tubers/sample Type - 1-pointed, 2-flat, 3-round, 4-long, 5-blocky Color - 1-red, 2-white, 3-buff, 4-brown, 5-dark brown Comments - CRS - Corky Ring Spot, SEB - Stem End Browning, Rz.- Rhizoctonia, IPS - Internal Purpling Syndrone
28
Table 5.
SELECTION
Tuber yield by grade for entries in the Statewide Chipping Trial, Klamath Experiment Station, 1988.
4-6 oz
YIELD No. l's 6-10 oz >10 oz
TOTAL B's cwt/A
YIELD No. 2's CULLS
TOTAL
Norchip Atlantic Kennebec Monona Shepody
156 137 79 161 64
112 132 138 190 97
55 121 278 96 305
323 390 494 448 466
90 68 31 56 27
32 13 70 5 51
54 5 100 0 30
500 476 695 509 574
NDO 1496-1 00083098-1 NDO 2382-4 NE 22.75-1 BR 7093-24
185 171 210 94 178
130 144 192 112 208
86 68 96 91 100
401 382 499 297 486
85 103 100 53 79
3 1 8 45 6
26 2 12 29 9
515 488 619 423 580
Average CV(%) LSD(.05)
143 19 40
146 26 54
129 31 58
419 17 100
69 30 30
24 59 20
27 64 25
538 11 87
Table 6.
Performance of entries in the Statewide Chipping Trial, Experiment Station, 1988. CHIP, COLOR1
SPECIFIC GRAVITY
H.H.
94 92 98 98 91
3.0 2.0 2.5 2.5 4.0
1.077 1.089 1.082 1.067 1.080
15 35 10 10 25
Cracks in 2's & culls Scab, CRS Bad cracks CRS, brown center
93 89 93 92 100
2.5 3.0 2.0 4.5 2.5
1.091 1.084 1.080 1.071 1.083
5 0 10 20 25
Cracks in culls
STAND SELECTION Norchip Atlantic Kennebec Monona Shepody NDO 1496-1 00083098-1 NDO 2382-4 NE 22.75-1 BR 7093-24
%
2
1/ Chip color - based on Potato Chip/Snack Food Assoc.
scale of 1 5 (1 light, 5 dark) -
2/ Hollow Heart
Klamath
-
-
-
percent in ten largest tubers/sample
3/ CRS - Corky Ring Spot
COMMENTS 3
CRS Scab, bad cracks
29 Table 7. Tuber yield by grade for entries in the Western Regional Trial, Klamath Experiment Station, 1988.
SELECTION
4-6 oz
YIELD U.S. NO.1's 6-10 oz >10 oz
TOTAL B's cwt/A
YIELD No. 2's CULLS
TOTAL
Russet Burbank Norgold Lemhi Red Lasoda
173 118 80 85
195 141 151 198
54 121 249 343
422 380 480 626
88 54 25 34
38 11 65 40
10 5 22 23
559 451 591 723
A7816-14 A7961-1 A79100-1 AC80369-1
111 71 33 63
153 144 91 125
118 144 310 174
382 358 434 362
65 27 13 22
105 44 62 67
. 27 12 8 19
578 441 517 470
C008014-1 NDTX9-1068-11R AC77101-1 C08011-5
96 77 83 64
202 165 144 110
206 188 295 184
504 430 521 358
33 36 18 34
35 34 38 33
11 30 10 14
584 530 587 439
BC0038-1 AC77226-13
83 84
131 144
266 159
480 387
33 41
50 19
4 3
567 450
51 57 52 117 52 120
73 111 89 99 92 170
284 419 297 95. 215 55
407 587 438 311 359 345
15 25 20 63 20 52
99 105 69 15 21 26
38 31 42 5 2 12
559 748 569 394 402 435
83 28 33
136 31 60
209 25 75
429 16 98
36 38 19
49 60 41
16 100 23
530 13 101
Shepody SH-1 Cal Gold ND840-1 A74114-4 Sierra Average CV% LSD (P=.05)
Table 8.
Performance of entries in the Western Regional Trial, Klamath Experiment Station, 1988. STAND X
VINE VIGOR'
99 91 96 100
4.0 2.5 3.8 3.5
1.084 1.070 1.087 1.071
10 20 43 45
5 5 5 10
1 1 3 2
Rough, growth cracks Knobs, skinning, rough
A7816-14 A7961-1 A79100-1 AC80369-1
98 94 94 96
4.0 3.5 3.8 4.0
1.088 1.081 1.072 1.081
50 20 78 43
0 0 10 0
3 1 5 2
Rough, Growth Growth Growth
C008014-1 NDTX9-1068-11R AC77101-1 C08011-5
95 83 99 85
3.3 3.5 3.3 4.8
1.080 1.063 1.072 1.063
5 0 10 0
0 10 0 0
1 1 3 1
Growth cracks, odd shape Severe skinning, cracks Flat, growth cracks, ugly Flat, growth cracks
BC0038-1 AC772 26-13
95 83
3.3 3.5
1".079 1.075
0 10
30 0
1 1
Nice Flattened, nice
Shepody SH-1 Cal Gold
95 94 95
3.0 4.8 3.0
1.078 1.076 1.069
10 43 0
0 5 0
1 4 1
Crooked Crooked, severe skinning Growth cracks, nice shape
1.068
0
15
1
SELECTION
Russet Burbank Norgold Lemhi Red Lasoda
'
ND840-1 A74114-4 Sierra
88 98
89
4,5 2.5
4.3
SPECIFIC GRAVITY
1,066 1.076
A.H. z 2
25 25
CRS X 3
0 0
SCAB RATING4
1 1
COMMENTS
ugly cracks cracks, rough skin cracks
Nice shape Stem-end disc., nice
1/-vine Vigor Rating - Sept. 13 (1-dead, 5-lush) 2/-H.H. - X of 10 largest tubers/plot 3/ Corky Ring Spot X of 10 largest tubers/plot 4/-Scab Rating - 1-none, 5-severe -
-
30
Table 9. Tuber yield by grade for Russet Burbank and five potato selections, Klamath Experiment Station.
SELECTION
YIELD U.S. No. l's 4-6 oz 6-10 oz >10 oz TOTAL B's No 2's CULLS TOTAL cwt/A 1987 Preliminary Yield Trial
Russet Burbank A083010-7 A083019-10 A083037-10 A083196-15
108 68 12 95 20
192 169 142 167 214
97 376 495 414 504
397 613 649 676 738
66 33 14 24 7
32 22 0 37 11
551 715 663 853 775
71 71
57 67
370 503
37 61 6 50 21 10 31 76 35
17 1 5 6 1 4 6 149 12
463 531 470 555 467 454 490 14 103
23 59 8 17 13 20 23 62 24
11 8 2 2 1 5 5 174 NS
489 434 486 534 530 458 488 12 87
56 48 0 116 19
1987 Statewide Yield Trial (Late Harvest) Russet Burbank A082616-18
58 42
85 103
66 194
209 339
33 26
1988 Statewide Yield Trial Russet Burbank A083010-7 A083019-10 A083037-10 A083196-15 A082616-18 Average CV(%) LSD(.05)
140 124 71 89 92 116 105 20 32
137 188 199 164 147 185 170 27 70
42 121 157 216 171
8R,
133 35 70 ,
320 433 427 469 409 389 408 18 110
89 36 32 30 36 51 46 28 20
1988 Screening Procedures Trial Russet Burbank A083010-7 A083019-10 A083037-10 A083196-15 A082616-18 Average CV(%) LSD(.05)
142 91 94 78 92 91 98 19 29
144 139 180 147 165 163 156 16 38
37 84 158 255 216 125 146 35 69
324 314 432 481 473 379 400 16 96
132 53 44 34 43 54 60 30 28
