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