25
Potato Variety Screening Trials, 1993
K.A. Rykbost and J. Maxwell s
INTRODUCTION
The Oregon potato variety development program is a cooperative project
involving two campus departments and four branch experiment stations located in
the potato producing regions. True seed from crosses made by the USDA-ARS
potato breeding program at Aberdeen, Idaho produces approximately 65,000 plants
in greenhouse culture in Corvallis. Tuberlings produced by these plants are grown as
single-hills at Powell Butte (about 50,000 annually) and Ontario (about 15,000
annually) in the year following greenhouse production. Selections from single hills
(400 to 700) are grown at Hermiston in four-hill plots and in seed increase plots at
Powell Butte in the second field season. Clones selected in the second year are
advanced to preliminary yield trials conducted at Powell Butte (COARC), Ontario
(MES), Hermiston (HAREC), and Klamath Falls (KES). Promising lines from this
one-year screening are promoted to the Oregon statewide trial conducted at the
same locations. Seedlings that survive three years of statewide evaluation are
entered in tri-state trials conducted at one location each in Oregon, Washington, and
Idaho. Selections that are advanced after two years in tri-state trials, are promoted
to western regional trials conducted at 13 locations in seven states. Regional trials
are the final step in the formal evaluation process. Selections remain in the regional
trials up to three years. Formal release as a named variety, if warranted, follows in
one to two years.
The USDA-ARS breeding program at Aberdeen has emphasized development
of russet-skinned selections with processing quality and disease resistance. Most of
the material selected in the Oregon program has been russets. A few tuberlings from
North Dakota and Colorado breeding programs are also screened in Oregon. All
three breeding programs are represented in five advanced Oregon selections that are
currently being considered for release.
Extensive data collected on each selection is carefully considered in decisions to
promote clones through the sequence of evaluations. This report on KES trials will
emphasize yield data. While yield is a very important consideration, many other
characteristics receive appropriate attention in determining the fate of clones.
1
/ Superintendent/Professor and Biological Sciences Research Technician,
respectively, Klamath Experiment Station, Klamath Falls, OR.
Acknowledgments: Partial funding for potato variety development by the Oregon
Potato Commission, the CSRS, and the ARS is gratefully recognized.
26
PROCEDURES
All variety screening trials were conducted in a two-year grain-potato rotation
with randomized complete block experimental design. The field was fumigated with
Telone II applied at 18 gpa on May 18. Gypsum was applied at 1 ton/A and plowed
down on May 27. All seed was hand cut to 1.5 to 2.0 ounce seedpieces, treated with
Tops 2.5 fungicide, and suberized at 50 °F and 95 percent relative humidity for two
weeks prior to planting. Potatoes were planted with a two-row, assisted-feed planter
in 32-inch rows on June 3. Di-Syston was applied at 3.0 lb ai/A in the seed furrow.
Fertilizer included 700 lb/A of 15-15-15, banded at planting, and 50 lb N/A applied
as solution 32 on June 15. Eptam was applied with a ground sprayer at 3.5 lb ai/A
on June 15 and incorporated immediately with a rolling cultivator.
Crops received about 16 inches of irrigation water during the season, applied
twice weekly with solid-set sprinklers on a 40-foot by 48-foot spacing. Standard
fungicides were applied aerially at labeled rates on July 29, August 14, and
August 29. Monitor was included in aerial applications at 0.75 lb ai/A on July 29
and August 29. Vines were desiccated with Diquat applied with a ground sprayer at
1.0 pint/A on September 18. Potatoes were harvested with a one-row digger-bagger
on October 4 and 5. All tubers were saved and stored under typical commercial
conditions until grading was done in early November.
The preliminary yield trial included five standard varieties and 99 selections in
single-row, 15-hill plots with two replications. Seed was spaced at 12 inches. The
statewide trial included five standard varieties and 21 numbered selections in singlerow, 30-hill plots with 8.7-inch seed spacing and four replications. The western
regional trial included four standard varieties and 16 numbered selections in 30-hill,
single-row plots with four replications and 8.7-inch seed spacing.
Plant emergence data were recorded on July 6 and July 20. Vine vigor was rated
on July 20 and vine maturity was rated on September 16. External tuber
characteristics were noted for each replication prior to grading. Internal defects were
recorded on 10 large tubers, usually over 10 ounces, cut longitudinally, from each
plot. Specific gravity was determined by the weight-in-air, weight-in-water method on
a 10-pound sample of U.S. No.1s in the 6- to 10-ounce size fraction. Yields of U.S.
No.ls were not adjusted for external blemishes such as rhizoctonia, elephant hide, or
scab, or internal defects such as hollow-heart or brown center. The incidence of
these defects was generally low. Approximately 10-pound samples of 6- to 10-ounce
U.S. No.ls were saved from one replication of each selection in all trials for culinary
evaluation. Culinary quality was evaluated for boiling, oven baking, and microwave
preparation methods. French fry quality was not determined due to high sugar
content and dark fry color in preliminary fry tests with several standard and
numbered selections. Culinary tests were conducted in early December after two
months of storage. Yield, grade, and size distribution data from statewide and
regional trials were subjected to statistical analysis using MSUSTAT software.
27
RESULTS AND DISCUSSION
High soil water content resulted from 2.03 inches of precipitation during the last
two weeks in May and 0.88 inches of rain the day after planting. Plant stands were
not adversely affected, however, and most selections achieved 95 to 100 percent
emergence. No herbicide injury occurred in any of the trials. Vine vigor was
generally good. Frost protection with sprinkler irrigation was required on July 15,
August 25, and September 14 and 15. Vines were generally very vigorous when
desiccated on September 18. Vine kill was aided by hard frosts on September 24 and
25. The combination of late planting and cool weather through most of the growing
season delayed maturity. High sugar content in tubers, as evidenced by dark fry
color, was probably due to growing season conditions in general. A minimum air
temperature of 24 °F on September 24 may have contributed to sugar levels
sufficient to produce dark fry color. Yields were generally lower than those observed
in the very favorable growing season experienced in 1992.
Preliminary Yield Trial
Emergence reached 90 percent in all but five numbered selections in this trial
(Table 1). Most selections produced vigorous vines that remained healthy until vines
were topkilled. The standard varieties demonstrated quite typical vine maturity and
specific gravity readings. Internal tuber quality was excellent in most selections.
Russet Burbank exhibited more hollow-heart and brown center than any other
selection in the trial. Very few other internal defects were observed in any of the
selections. Growth cracks were the most common external defects observed. Several
selections had up to 15 to 20 percent of total yield as U.S. No.2s or culls due to
growth cracks. Skinning damage at harvest was a common problem in those
selections with late maturity.
The standard varieties all achieved relatively high yields with a high percent of
U.S. No.1s (Table 2). Shepody yields were higher than in previous KES trials. In
most previous trials herbicide injury has seriously affected Shepody. Russet Norkotah
also achieved a high yield with excellent size distribution for count cartons. Russet
Burbank had small size in spite of the 12-inch seed spacing used. However, tuber
type was better than normal and percent No.2s and culls was very low for Russet
Burbank, compared to typical performance under local conditions.
Only five numbered selections produced higher yields of No.1s than all standard
varieties in the KES trial. Over one-half of the selections exceeded Russet Burbank
in No.1 yields. Nineteen selections were promoted to the statewide trial for 1994. All
but three of these exceeded Russet Burbank's No.1 yield at KES (Table 2). At
Ontario and Hermiston, Russet Burbank achieved excellent yields under cooler than
normal weather conditions. Several selections advanced to the statewide trial did not
yield as well as Russet Burbank at these locations. However, averaged over all
locations, Russet Burbank had 16 and 21 percent hollow-heart and brown center,
respectively. Very few of the numbered selections had over 5 percent of both defects
combined.
28
Selections that performed well across all locations included four fresh market
lines: A087119-3; A087224-5; A087245-9; and A089142-2; and three clones with
good processing quality: A087277-6; A089113-1; and A089142-6. One russetted
selection; A087257-1, with bright yellow flesh color, was retained for further
evaluation. All of these selections produced relatively high yields at KES.
Oregon Statewide Trial
All selections in this trial achieved over 90 percent emergence (Table 3).
Canopy vigor was generally good, and specific gravity of standard varieties was
normal. None of the selections were earlier in vine maturity than Norkotah. Several
exhibited later maturity than Russet Burbank. At 8.7-inch seed spacing, tuber size
was generally smaller than in the preliminary yield trial, and internal defects were
less common. Skinning damage was noted in three selections. Growth cracks were
only noted on Russet Burbank
All standard varieties produced lower yields and much smaller size than in the
preliminary yield trial (Table 4). The closer seed spacing in the statewide trial was
responsible for smaller tuber size. Larger plot size and more replications accounts in
part for lower yields. Yield of U.S. No.ls for Russet Burbank, Lemhi, Shepody, and
Russet Norkotah were about 75 percent of yields in the preliminary trial, while
yields of Bs (tubers under 4 ounces) were higher.
A74212-1E and A083037-10 were evaluated in the western regional trial for the
third year in 1993. A74212-1E will be released as Century Russet in 1994. Averaged
across locations, it achieved the highest yield of Nods in statewide trials in 1992 and
1993, and was third highest in 1991. A083037-10 has also produced very high yields,
but does not have a very attractive tuber type or appearance. This selection is being
discarded from the Oregon program.
A082611-7 and CO083008-1 are in advanced stages of evaluation by processors,
and have completed three years of testing in the regional program. Both are being
considered for release pending processor acceptance. ND02904-7 is an early
maturing fresh market clone that was included in the regional trials for the first time
in 1993. A085165-1 is also a fresh market selection. It was evaluated in the tri-state
trial in 1993. Both of these selections have Russet Norkotah as one parent, and both
have very attractive tuber type.
With the possible exception of A082611-7, each of these advanced Oregon
selections performed well in this and other trials, and are likely candidates for
naming and release. A085165-1 will be entered in the regional trial in 1994 while
ND02904-7 will be included for the second year. Additional performance data will
be provided on several of these selections later in this report.
Two additional selections from the statewide trial were retained for further
testing. A084022•108 was promoted to the tri-state trial for 1994. It is a multipurpose selection with an attractive russet type. A085436-1 is a round white
29
chipping selection that ranked second to A74212-1E in yield across locations. It will
be included in the statewide trial for the second year in 1994. All other selections
were discarded. All selections retained for further evaluation were free of serious
culinary deficiencies. A085165-1 had the highest score of all selections in the trial.
Western Regional Trial
The 1993 regional trials included six early harvest sites and 10 late harvest
locations. Although the KES trial was reported as a late harvest trial, time from
planting to harvest was similar to early harvest trials at other locations. Plant
emergence was less than 90 percent for A083037-10 and ATX84378-1, but 95
percent or higher for all other selections (Table 5). Reduced canopy vigor and
earlier vine maturity of standard varieties compared with the statewide trial were
probably due to soil differences. All cultural practices were the same for both trials.
Lower specific gravity was also noted in the regional trial for Russet Burbank,
Lemhi, and Shepody.
Russet Burbank and Lemhi yields were very similar to those observed in the
statewide trial (Table 6). Shepody and Norkotah yields were considerably lower in
the regional trial. A74212-1E produced the highest yield of U.S. No.ls in this trial
and across locations in both early and late harvest trials. This is consistent with the
performance of this selection over several years. A083037-10 was second highest in
yield at KES and across locations in late harvest trials. High yields were also
observed for A81286-1 and A8333-5. Both of these selections are dual purpose
russets that remain in the trials in 1994. Both received high scores for culinary
quality.
ND02904-7 produced nearly 50 percent more No.ls than Russet Norkotah in
the KES trial. In six early harvest trials, yields were similar for ND02904-7 and
Norkotah. Both entries were also included in six late harvest regional trials.
ND02904-7 averaged 63 cwt/A more No.1s than Russet Norkotah in these trials.
In addition to A74212-1E, selections graduating from three years in the regional
trial include A81473-2, A82119-3, and ATX84378-1. Final disposition of these
selections will be determined by cooperators in Idaho and Texas. Selections
discarded included AC83172-1, A79180-10, and A081235-102. The latter two early
maturing selections were not evaluated at KES. Other entries will remain in the
early or late harvest trials in 1994.
Advanced Oregon Selections
The Oregon potato variety selection and development program will be releasing
several new varieties in the next two to three years. Two selections; A74212-1E, and
NDO2904-7, are strictly fresh market types that have shown superior performance in
KES trials and are excellent prospects for Klamath Basin production. Two dual
purpose selections, C0083008 1 and A082611 7, are more likely to gain acceptance
as processing varieties in the Columbia Basin and the Treasure Valley. The yield,
-
-
30
grade, and size distribution of these selections in statewide and regional trials
conducted at Klamath Falls since 1990 is compared with Russet Burbank and Russet
Norkotah (Table 7). Data represent averages from six trials for each selection.
Total yield of U.S. No.ls for A74212-1E is 53 percent higher than for Russet
Burbank, with a higher percent in count carton sizes. ND02904-7 has averaged 25
percent more No.1s than Russet Norkotah with better size distribution for count
cartons. C0083008-1 has produced similar yields and size to ND02904-7, but tuber
type and appearance are not as attractive. A082611-7 does not achieve yields much
higher than Russet Burbank under Klamath Basin conditions.
One additional Oregon selection that has shown considerable promise is a round
white chipping clone, ND01496-1. This selection was not included in any of the
trials discussed above in 1993, but was evaluated in the Snack Food Association
chipping trials conducted at several locations in the United States and Canada. This
selection will produce light chip color out of 45 °F storage and will recondition
better than other chipping lines out of cold storage. Its release is being considered
pending performance in the Snack Food Association trials.
Summary
The Oregon potato variety development program was formalized and expanded
in 1983. During the ensuing 10 years, much progress has been achieved. Within the
next two to three years, the program will release two fresh market selections, at least
one processing or dual purpose line, and possibly one chipping variety. The
prospects for improving on Russet Burbank and Russet Norkotah for fresh market
crops in the Klamath Basin appear to be excellent. The difficult growing season
experienced locally in 1993 clearly demonstrated the limitations of Russet Burbank
in short-season areas. Late planted crops produced few count carton size tubers.
Internal defects were common in crops planted early. These problems were even
more pronounced in Eastern Idaho production areas. NDO2904-7 appears to be a
good candidate for fresh market production with earlier maturity than Russet
Burbank, and the ability to produce a high percent of count carton size tubers.
A74212-1E has found limited acceptance in Texas and is being evaluated in eastern
U.S. and Canada production areas. It produced high yields and high economic
returns in several commercial fields in the Klamath Basin in 1993.
31
Table 1. Performance of entries in the Preliminary Yield Trial, Klamath Falls, OR. 1993.
Variety/
selection
Percent
stand
Vigor
rating1
Russet Burbank
Lemhi
Shepody
Norkotah
Atlantic
100
100
100
100
97
5.0
3.0
4.5
35
4.0
A087007-8
A087009-2
A087009-3
A087009-5
A087009-8
97
97
97
100
100
A087009-9
A087009-14
A087009-16
A087011-1
A087011-2
Vine
maturity2
Specific
gravity
Percent
H.H. & B.C. 3
2.5
2.0
3.0
2.0
3.5
1.087
1.090
1.081
1.070
1.096
35
0
0
0
5
fair
poor
3.0
1.0
2.5
4.0
4.5
3.5
3.5
2.5
3.0
2.5
1.078
1.082
1.073
1.078
1.082
0
25
0
0
0
sk, rough, ugly
ugly
too round
rough, GC
IPS
100
97
100
83
100
4.0
3.5
2.5
4.0
4.0
3.5
2.0
3.0
3.0
3.0
1.075
1.091
1.084
1.082
1.087
0
0
5
0
0
GC, ugly
fair
nice
coarse
coarse
A087011-7
A087011-8
A087011-10*
A087011-11
A087018-2
93
97
97
100
93
3.0
3.0
3.0
3.0
4.5
3.5
4.5
3.0
4.0
2.0
1.073
1.079
1.079
1.083
1.070
5
0
5
5
0
fair
coarse
misshapen
fair, pty
poor
A087018-3
A087018-4
A087018-6
A087018-9
A087018-20*
90
97
90
97
100
2.0
3.0
2.5
4.0
4.0
3.0
2.5
2.5
2.0
3.5
1.074
1.080
1.072
1.078
1.080
5
10
0
0
0
A087018-21
A087018-22
A087018-23*
A087025-1
A087032-4*
97
100
100
100
100
2.0
4.0
3.5
3.0
3.5
2.0
2.5
2.0
4.0
3.5
1.070
1.076
1.086
1.091
1.079
0
0
0
5
0
long, nice
fair
nice
ug ly
sk, rough
A087032-6
A087032-7
A087063-4
A087079-1
A087111-2
100
93
90
93
97
4.0
2.0
3.5
2.0
3.0
2.5
3.5
4.0
3.0
2.5
1.087
1.081
1.083
1.086
1.083
0
0
0
0
0
nice, heavy net
fair, heavy net
IPS
coarse, fair
sk, rough
A087111-6
A087118-1
A087119-1
A087119-3*
A087138-5
93
100
100
100
97
2.5
4.5
3.5
4.0
3.0
4.0
2.5
4.0
25
3.0
1.070
1.078
1.071
1.074
1.071
0
0
0
0
0
EH, rough
too round
rough, ugly
long, nice
fair
A087138-8
A087138-11
A087138-14
A087206-3*
A087211-9
87
100
100
100
100
4.0
3.5
4.0
4.0
2.5
2.0
2.0
3.5
2.5
25
1.070
1.072
1.074
1.084
1.073
5
0
5
0
5
fair
fair
fair
nice net
heavy net
A087212-3*
A087217-4
A087217-7
A087218-6
A087218-13*
93
97
97
93
93
4.0
4.5
3.0
2.5
3.0
2.5
3.5
3.0
3.0
2.0
1.076
1.088
1.080
1.080
1.084
0
0
0
0
0
very nice
GC, SB
fair
rough, EH
very nice
A087221-2
A087223-2
A087223-5
A087224-1
A087224-5*
90
100
83
100
100
1.0
2.5
3.0
4.0
4.0
2.5
3.5
2.0
2.0
2.5
1.083
1.069
1.077
1.078
1.085
0
0
5
0
0
sk, ugly
Comments 4
fair
fair
coarse
coarse
EH, not bad
SEB, coarse, rough
rough, ugly
fair
fair, heavy net
nice
32
Table 1. Performance of entries in the Preliminary Yield Trial, Klamath Falls, OR. 1993. (contd)
Variety/
selection
Percent
stand
Vigor
rating'
Vine
maturity2
Specific
gravity
Percent
H.H. & B.C. 3
Comments 4
A087228-3
A087229-1
A087230-1
A087230-2
A087232-1
93
100
100
97
87
3.5
3.0
2.0
2.0
3.0
2.5
3.5
3.0
2.5
2.5
1.079
1.072
1.069
1.074
1.077
0
0
5
0
0
very nice
GC, SB
fair
nice smooth
coarse, rough
A087232-3
A087232-5
A087232-8
A087233-8
A087234-1
97
100
97
100
100
2.5
3.0
4.0
3.5
2.5
3.5
4.0
3.5
4.0
3.5
1.075
1.074
1.069
1.088
1.080
0
0
0
10
0
flat
coarse, fair
severe sk
severe sk
coarse, rough
A087234-6*
A087245-9*
A087245-13
A087245-22
A087245-24
100
100
100
97
97
4.5
3.5
3.0
3.0
3.5
3.5
3.5
2.0
2.5
2.0
1.082
1.078
1.080
1.075
1.075
0
0
0
0
0
sk, GC, IPS
fair
fair
GC, EH
GC, ugly
A087251-2
A087257-1*
A087257-7
A087257-18
A087258-5
83
97
100
100
100
2.5
3.5
2.0
2.5
2.0
1.083
1.080
1.075
1.075
1.073
5
0
0
0
10
pty, light YF
bright YF
light YF
poor
ugly, GC
A087259-1
A087259-8
A087262-1
A087267-1
A087274-11
97
100
100
100
93
3.0
3.0
3.5
3.0
3.5
3.5
4.0
3.0
5.0
2.0
2.5
3.0
4.0
3.5
3.5
1.086
1.080
1.089
1.080
1.084
0
0
5
0
5
GC
rough, sk
GC
fair
sk
A087277-6*
A087278-2
A089111-6
A089113-1*
A089128-4*
97
100
93
100
93
4.5
4.0
3.0
4.0
4.0
3.0
2.0
2.5
2.5
3.0
1.082
1.089
1.078
1.087
1.094
5
0
0
0
0
SB, flat
small
fair
fair
sk
A089142-2*
A089142-3
A089142-4
A089142-6*
A089142-7
100
100
100
100
90
2.5
4.5
3.0
4.0
4.0
3.0
3.0
2.5
4.0
2.5
1.079
1.080
1.087
1.090
1.076
0
0
0
0
0
fair, sk
sk, coarse
sk, rough
severe sk
rough, sk
A089142-8
A089235-1
CO089003-2*
C0089018-2
C0089026-5
100
100
100
97
90
2.0
3.5
4.0
2.0
3.0
5.0
2.0
3.5
2.5
3.5
1.081
1.077
1.079
1.079
1.078
0
0
0
0
5
severe sk
no yield
coarse, sk
no yield
coarse, ugly
C0089026-8
C0089032-6
C0089034-3
C0089034-4
C0089037-6
90
97
90
100
93
3.5
3.5
3.5
4.5
3.5
3.0
3.5
2.5
3.0
2.0
1.086
1.081
1.081
1.078
1.072
0
0
0
0
0
nice
fair
fair
small
nice
CO089065-2*
A087286-206
A089031-202
90-2
97
100
97
100
4.0
3.0
3.5
3.0
2.5
2.0
2.0
4.0
1.088
1.082
1.084
1.079
0
0
5
0
sk, coarse
fair
fair
too round
Advanced to 1994 Oregon Statewide Trial
/ Vigor rating: (1 - small, weak; 5 - large, robust)
2 / Vine maturity: (1 - early; 5- late)
3 / H.H. anc B.C.: (Hollow heart plus brown center - % in 10 large tubers/sample)
4 / Comments:
GC - growth cracks, sk - skinning damage, EH - elephant hide, SB - shater bruise,
YF - yellow flesh, IPS - internal purple spots, SEB - stem end browing, pty - pointy
1
33
Table 2. Tuber yield by grade for entries in the Preliminary Yield Trial, Klamath Falls, OR. 1993.
Variety/
Selection
Yield U.S. No. is
> 12 oz.
4-12 oz.
Yield
Total
No. 2s
Culls
Total
cwt/A
Russet Burbank
Lemhi
Shepody
Norkotah
Atlantic
388
330
337
400
333
43
222
226
154
72
431
552
563
554
405
50
20
20
27
46
16
11
5
0
9
5
2.3
U
2
44
502
606
599
583
504
A087007-8
A087009-2
A087009-3
A087009-5
A087009-8
331
137
283
311
326
109
49
39
163
9
440
186
322
474
335
47
35
49
28
78
34
0
10
24
3
51
58
1
65
26
572
279
382
591
442
A087009-9
A087009-14
A087009-16
A087011-1
A087011-2
274
453
357
344
324
198
17
44
167
206
472
470
401
511
530
24
49
30
21
15
9
3
4
35
3
86
12
11
65
5
591
534
446
632
553
A087011-7
A087011-8
A087011-10*
A087011-11
A087018-2
317
356
255
314
190
37
131
237
196
37
354
487
492
510
227
55
44
18
30
73
0
5
9
12
4
7
1
12
10
10
416
537
531
562
314
A087018-3
A087018-4
A087018-6
A087018-9
A087018-20*
190
252
191
299
315
124
141
161
148
56
314
393
352
447
371
28
25
24
27
56
0
9
3
24
28
0
6
8
10
71
342
433
387
508
526
A087018-21
A087018-22
A087018-23*
A087025-1
A087032-4"
253
320
347
321
297
51
62
104
67
28
304
382
451
388
325
17
46
47
70
29
0
3
0
12
18
16
13
5
1
45
337
444
503
471
417
A087032-6
A087032-7
A087063-4
A087079-1
A087111-2
305
198
369
250
386
39
144
69
216
64
344
342
438
466
450
62
9
72
21
43
10
14
3
0
0
3
13
9
8
11
419
378
522
495
504
A087111-6
A087118-1
A087119-1
A087119-3*
A087138-5
293
392
357
360
213
147
63
152
233
195
440
455
509
593
408
43
60
53
39
16
3
9
11
36
4
17
7
31
5
10
503
531
604
673
438
A087138-8
A087138-11
A087138-14
A087206-3*
A087211-9
337
377
277
384
292
63
93
133
45
34
400
470
410
429
326
64
61
26
88
25
6
16
5
6
4
1
38
45
5
11
471
585
486
528
366
A087212-3*
A087217-4
A087217-7
A087218-6
A087218-13*
348
350
329
283
357
105
156
39
95
113
453
506
368
378
470
19
15
51
43
18
5
16
0
0
2
8
134
28
23
8
485
671
447
444
498
A087221-2
A087223-2
A087223-5
A087224-1
A087224-5*
89
408
361
367
346
36
53
98
81
211
125
461
459
448
557
43
39
46
53
60
3
0
8
0
3
9
1
1
1
17
180
501
514
502
637
34
Table 2. Tuber yield by grade for entries in the Preliminary Yield Trial, Klamath Falls, OR. 1993.
(contd)
Variety/
Selection
Yield U.S. No. Is
4-12 oz.
> 12 oz.
Yield
Total
Bs
No. 2's
Culls
Total
cwt/A A087228-3
A087229-1
A087230-1
A087230-2
A087232-1
306
293
354
243
120
45
219
8
116
383
351
512
362
359
503
54
33
56
16
8
0
7
3
0
0
4
45
7
0
25
409
597
428
375
536
A087232-3
A087232-5
A087232-8
A087233-8
A087234-1
316
285
324
358
193
148
248
242
68
320
464
533
566
426
513
17
39
26
53
20
10
5
9
6
0
2
6
51
36
20
493
583
652
521
553
A087234-6*
A087245-9*
A087245-13
A087245-22
A087245-24
240
321
268
233
292
280
94
123
79
520
520
362
356
371
22
16
24
30
48
49
0
5
19
21
65
32
14
52
59
656
568
405
457
499
A087251-2
A087257-1*
A087257-7
A087257-18
A087258-5
322
287
266
241
151
13
168
123
117
24
335
455
389
358
175
86
18
21
13
22
0
3
6
11
70
12
8
26
18
117
433
484
442
400
384
A087259-1
A087259-8
A087262-1
A087267-1
A087274-11
363
370
302
341
347
70
95
163
200
32
433
465
465
541
379
41
38
32
44
44
28
0
19
14
2
56
38
57
8
5
558
541
573
607
430
A087277-6*
A087278-2
A089111-6
A089113-1*
A089128-4*
339
415
394
486
338
170
14
7
85
74
509
429
401
571
412
32
49
55
39
57
19
2
0
12
19
23
0
9
9
21
583
480
465
631
509
A089142-2*
A089142-3
A089142-4
A089142-6*
A089142-7
329
430
373
447
281
270
216
19
72
142
599
646
392
519
423
17
30
63
59
18
0
8
0
5
21
9
21
35
9
47
625
705
490
592
509
A089142-8
A089235-1
CO089003-2*
C0089018-2
C0089026-5
373
200
351
161
297
84
0
104
123
243
457
200
455
284
540
46
63
33
34
18
9
7
6
7
8
20
26
9
7
31
532
296
503
332
597
C0089026-8
C0089032-6
C0089034-3
C0089034-4
C0089037-6
264
304
344
407
304
215
128
133
18
115
479
432
477
425
419
28
28
32
49
46
6
0
5
0
0
14
5
0
16
0
527
465
514
490
465
CO089065-2*
A087286-206
A089031-202
90-2
320
383
335
377
196
22
59
53
516
405
394
430
9
51
56
29
22
0
4
3
14
7
4
3
561
463
458
465
Mean
313
116
429
38
9
21
498
199
* Advanced to 1994 Oregon Statewide Trial
35
Table 3. Performance of entries in the Oregon Statewide Trial, Klamath Falls, OR. 1993.
Variety/
selection
Percent Vigor
stand ratings
Russet Burbank
Lemhi
Shepody
Norkotah
Atlantic
Vine
maturity2
Specific
gravity
Percent
H.H. & B.C. 3
Comments 4
100
94
97
100
99
4.3
3.5
3.5
4.0
4.8
2.8
2.5
2.5
2.0
3.0
1.085
1.090
1.082
1.072
1.096
10
0
0
0
0
rough, GC
smooth, fair
nice
nice
A74212-1E
A082611-7
C0083008-1
A083037-10
NDO 2904-7
96
98
96
91
98
3.3
4.0
3.8
3.8
4.5
3.0
2.8
3.0
4.3
2.3
1.082
1.085
1.087
1.079
1.071
0
0
0
0
0
smooth, nice
fair, pty
coarse, flat
flat, fair
nice
A085165-1
C0086042-2
A083221-204
A083141-5
A083113-4
100
99
98
99
95
3.5
3.8
2.5
4.0
3.0
3.3
2.8
3.0
2.5
3.8
1.077
1.076
1.081
1.094
1.078
0
0
5
0
0
nice
poor
smooth, skinning
smooth, skinning
coarse, nice net
A084022-108
A084017-1
A084053-2
A085105-1
A085419-5
100
99
98
96
99
3.0
4.0
4.3
3.8
4.8
3.0
2.8
2.3
3.0
3.3
1.091
1.073
1.078
1.078
1.088
0
0
0
0
10
nice
fair
coarse, skinning
nice
nice
A085419-12
A085436-1
C0088165-5
A088114-2
A087138-2
A088009-1
98
95
98
91
98
100
4.5
4.5
2.8
3.5
2.0
4.0
3.0
3.5
2.3
3.0
2.3
2.3
1.087
1.079
1.100
1.080
1.078
1.095
0
3
0
0
0
0
97
3.8
2.9
1.083
1
Mean
1/
Vigor rating:
/ Vine maturity:
/ H.H. and B.C.:
4 / Comments:
2
nice
small
fair, pty
small
small
(1 - small, weak; 5 - large, robust)
(1 - early; 5- late)
(Hollow heart plus brown center - % in 10 large tubers/sample)
GC - growth cracks, pty - pointy
36
Table 4. Tuber yield by grade for entries in the Oregon Statewide Trial, Klamath Falls, OR. 1993.
Variety/
selection
Yield U.S. No. is
4-12 oz.
> 12 oz.
Total
Bs
Yield
No. 2s
Culls
Total
cwt/A
Russet Burbank
Lemhi
Shepody
Norkotah
Atlantic
309
299
280
319
338
15
80
147
79
26
324
379
427
398
365
85
39
22
45
78
33
22
23
8
14
32
13
20
12
11
474
453
492
463
468
A74212-1E
A082611-7
C0083008-1
A083037-10
NDO 2904-7
370
335
301
329
253
72
30
160
176
154
442
365
461
505
407
53
77
28
31
34
2
3
7
4
2
11
5
18
14
7
508
450
514
554
450
A085165-1
C0086042-2
A083221-204
A083141-5
A083113-4
389
377
325
365
249
112
61
41
41
219
501
438
366
406
468
50
64
51
90
28
10
20
2
13
13
3
36
3
4
46
564
558
422
513
555
A084022-108
A084017-1
A084053-2
A085105-1
A085419-5
303
358
278
334
435
78
56
211
123
151
381
414
490
457
586
32
48
35
28
40
13
12
22
3
4
14
14
14
11
10
440
490
561
499
640
A085419-12
A085436-1
COO88165-5
A088114-2
A087138-2
A088009-1
380
413
219
244
205
307
57
126
25
63
2
4
436
539
244
307
207
311
54
73
54
39
95
111
5
11
15
5
2
5
10
16
7
24
1
12
505
639
320
375
305
439
Mean
CV(%)
LSD(.05)
320
16
71
89
39
49
409
13
75
53
29
22
11
87
13
14
92
19
487
13
87
37
Table. 5. Performance of entries in the Western Regional Potato Variety Trial,
Klamath Falls, OR. 1993.
Variety/
selection
Russet Burbank
Lemhi
Norkotah
Shepody
Percent Vigor
Vine
Specific
stand
rating smaturity2gravity
Percent
H.H. and B.C. 3
99
99
95
98
4.0
3.0
3.3
2.5
2.3
2.5
1.5
2.0
1.082
1.084
1.073
1.075
13
5
0
0
100
100
98
95
98
3.8
4.0
2.5
3.3
3.8
3.0
3.3
3.0
2.8
3.5
1.076
1.076
1.077
1.081
1.078
0
0
0
0
0
A083037-10
A084275-3
ATX 84378-1
NDO 2904-7
A8495-1
86
98
88
96
99
3.8
3.5
3.5
3.8
2.5
4.0
3.5
3.3
2.3
3.8
1.075
1.085
1.076
1.069
1.083
3
0
0
0
0
A81386-1
A84180-8
A8333-5
AC83064-1
AC83064-6
AC83172-1
99
98
99
96
95
98
3.3
3.8
4.0
2.3
3.5
3.0
2.8
2.8
3.0
2.8
2.3
2.5
1.075
1.074
1.073
1.073
1.078
1.083
0
3
0
0
0
0
Mean
97
3.4
2.9
1.077
1
A74212-1E
A81286-1
A81473-1
A82119-3
A8390-3
/ Vigor rating: (1 - small, weak; 5 - large, robust)
/ Vine maturity: (1 - early; 5 - late)
3 / H.H. and B.C.: (hollow heart and brown center - % in 10 large tubers/sample
1
2
38
Table 6. Tuber yield by grade for entries in the Western Regional Potato Variety Trial,
Klamath Falls, OR. 1993.
Variety/
selection
Yield U.S. No. is
4-12 oz.
>12 oz.
Total
Bs
Yield
No. 2s
Culls
Total
cwt/A
Russet Burbank
Lemhi
Norkotah
Shepody
294
320
217
205
9
76
19
62
303
396
236
267
59
40
40
28
18
19
2
5
34
20
7
4
414
475
285
304
A74212-1E
A81286-1
A81473-1
A82119-3
A8390-3
490
357
247
297
362
99
122
145
83
16
589
479
392
380
378
54
36
24
36
54
8
14
7
12
6
6
35
8
0
1
657
564
431
428
439
A083037-10
A084275-3
ATX 84378-1
NDO 2904-7
A8495-1
329
405
91
244
345
233
78
252
108
52
562
483
343
352
397
20
65
18
32
43
9
7
20
8
10
3
4
81
5
10
594
559
462
397
460
A81386-1
A84180-8
A8333-5
AC83064-1
AC83064-6
AC83172-1
334
316
427
308
242
254
29
113
81
85
48
45
363
429
508
393
291
299
64
22
52
33
43
38
3
18
3
6
3
5
4
27
11
3
9
14
434
495
574
435
346
356
Mean
CV(%)
LSD(.05)
304
19
80
88
36
45
392
17
95
40
36
21
9
99
13
14
71
15
455
16
104
39
Table 7. Four-year, six-trial summary of tuber yields by grade for Russet Burbank,
Norkotah, and four advanced Oregon potato selections grown at Klamath
Falls, OR. in 1990 - 1993.
Variety/
selection
Yield U.S. No. 1s
4-12 oz.
> 12 oz. Total
Bs
Yield
No. 2s & Culls
Total
cwt/A Russet Burbank
Norkotah
314
252
42
89
356
340
77
38
58
20
491
398
A74212-1E
NDO 2904-7
C0083008-1
A082611-7
408
267
273
294
137
158
155
83
545
425
428
377
46
29
31
67
21
13
28
30
612
467
487
474
1
/ Size fractions were separated at 10 oz. in 1990 and 12 oz. in 1991 - 1993.