NCSU Cucumber Breeding Report - 2010
Todd C. Wehner
Professor
Tammy L. Ellington
Research Specialist
Department of Horticultural Science
North Carolina State University
Raleigh, NC 27695-7609
Kinston Spring (Stage 4) Slicing Cucumber Trial
2010
Todd C. Wehner and Tammy L. Ellington
Experiment Design
1. A randomized complete block with 3 replications of slicer cultivars and
breeding lines (collectively referred to as cultigens) was grown.
2. Plots were single 20 ft. rows with 5 ft. alleys at each end.
3. Rows were on raised 18" beds spaced 60" apart (center to center).
4. Fertilizer consisted of 80-80-80 lb/A (N-P-K) broadcast preplant
and 30-0-0 lb/A (N-P-K) sideplaced at the 2 to 4 leaf stage.
5. Curbit was applied preemergence at the rate of 1 lb. a.i./A.
6. The trial was planted 27 April, and harvested 6 times
(Mondays and Thursdays) between 15 June and 2 July.
Data Collection
1. Fruit were weighed after sorting into No.1, No.2 and cull
(nubs and crooks) grades according to U.S.D.A. standards.
2. Fruit length, diameter and weight were recorded for 3 fruit per plot.
3. Quality ratings were from 1 to 9, with 1 = worst, 9 = best.
4. Disease ratings were from 0 to 9, with 0 = no disease, 1-2 = trace,
3-4 = slight, 5-6 = moderate, 7-8 = severe, 9 = plant dead.
Results
The following cultigens performed well, and could be advanced
to the next stage:
1 NC-Stratford NC StateUniv
2 Dasher II Mon-Seminis
3 G83xNC-58 NC StateUniv
4 G83xNC-63 NC StateUniv
5 Intimidator Mon-Seminis
Table 27. Stage 3 spring slicer trial (Kinston) - yield data (cultigens ranked by
cwt/A of Fancy + No. 1 grade fruit).
_________________________________________________________________________________
Yield(cwt/A) Percent Plants
Cultivar Seed Fancy Market- fancy Percent per A
Rank or line source +No.1 able +No.1 culls (x1000)
_________________________________________________________________________________
1 NC-Stratford NC StateUniv 395 622 52 19 24
2 Dasher II Mon-Seminis 375 475 71 11 26
3 G83xNC-59 NC StateUniv 322 496 52 17 26
4 Ashley Check 321 528 55 12 13
5 Cherokee 87 Check 319 521 54 12 22
6 Panther BayerNunhems 294 422 60 13 17
7 General Lee Clause-HM 293 435 58 15 24
8 Intimidator Mon-Seminis 292 393 61 18 26
9 G83xNC-63 NC StateUniv 276 433 53 18 24
10 G83xNC-62 NC StateUniv 252 434 49 17 25
11 G83xNC-58 NC StateUniv 243 498 42 15 21
12 Poinsett 76 Cornell Univ 241 404 53 15 22
13 Marketmore76 Check 207 264 75 4 21
14 NC-Sunshine NC StateUniv 201 375 43 24 14
_________________________________________________________________________________
CV (%) 20 18 16 30 16
Mean 288 450 55 15 22
LSD (5%) 96 135 15 7 6
_________________________________________________________________________________
Correlation (Marketable yield with % culls) = -0.11ns
Table 28. Stage 3 spring slicer trial (Kinston) - earliness data (cultigens
ranked by weight of Fancy + No.1 grade fruit in harvests 1 and 2).
_________________________________________________________________________________
Cumulative fruit weight and % of
total weight (6 harvests) for harvest:
Cultivar Seed 1 1-2 1-3 1-4 1-5
Rank or line source Wt. % Wt. % Wt. % Wt. % Wt. %
_________________________________________________________________________________
1 NC-Stratford NC StateUniv 199 32 279 45 342 55 444 71 539 87
2 G83xNC-62 NC StateUniv 169 39 209 48 261 60 341 79 420 97
3 G83xNC-58 NC StateUniv 123 25 206 41 261 53 341 69 430 86
4 NC-Sunshine NC StateUniv 120 33 197 53 249 67 296 81 361 96
5 G83xNC-63 NC StateUniv 141 34 195 46 240 56 300 70 381 89
6 Ashley Check 42 8 194 35 259 47 317 59 478 91
7 G83xNC-59 NC StateUniv 108 22 184 37 260 52 340 68 426 86
8 Cherokee 87 Check 120 23 177 34 250 48 386 74 463 89
9 Dasher II Mon-Seminis 113 24 166 35 236 50 330 69 412 87
10 Intimidator Mon-Seminis 100 25 162 41 214 54 266 68 328 84
11 Panther BayerNunhems 80 19 139 33 187 44 254 60 380 90
12 General Lee Clause-HM 89 20 111 25 209 48 285 65 379 87
13 Poinsett 76 Cornell Univ 50 11 98 21 203 48 233 56 358 88
14 Marketmore76 Check 0 0 21 8 104 39 156 59 217 82
_________________________________________________________________________________
CV (%) 24 25 29 17 28 14 22 11 19 6
Mean 104 23 167 36 234 51 306 68 398 88
LSD (5%) 42 10 82 10 109 12 114 13 125 9
_________________________________________________________________________________
Correlation (Marketable yield with yield in harvests 1-2) = 0.83**
Correlation (Marketable yield with % of yield in harvests 1-2) = 0.45*
Table 29. Stage 3 spring slicer trial (Kinston) - fruit quality data (cultigens
ranked by average quality).z
_________________________________________________________________________________
Cultivar Seed Average Seed- Overall
Rank or line source quality Shape Color cell impression
_________________________________________________________________________________
1 Dasher II Mon-Seminis 7.3 7 7 7 8
2 General Lee Clause-HM 6.8 7 7 6 7
3 Intimidator Mon-Seminis 6.7 8 7 5 8
4 G83xNC-58 NC StateUniv 6.7 7 7 6 7
5 Poinsett 76 Cornell Univ 6.6 7 7 6 7
6 NC-Sunshine NC StateUniv 6.6 7 8 6 7
7 Panther BayerNunhems 6.3 7 8 5 7
8 NC-Stratford NC StateUniv 6.3 7 7 6 6
9 G83xNC-63 NC StateUniv 6.3 7 8 5 7
10 Marketmore76 Check 6.2 6 6 6 6
11 G83xNC-62 NC StateUniv 6.1 7 8 5 6
12 Ashley Check 6.0 6 6 6 6
13 G83xNC-59 NC StateUniv 5.8 6 7 5 6
14 Cherokee 87 Check 5.3 5 5 6 5
_________________________________________________________________________________
CV (%) 11.6 10 11 25 11
Mean 6.4 7 7 6 7
LSD (5%) 1.2 1 1 2 1
_________________________________________________________________________________
z Quality rated 1 to 9 (1 = poor, 5 = average, 9 = excellent;
except color where 1 = white, 5 = medium green, 9 = very dark green).
Correlation (Marketable yield with average quality) = -0.12ns
Table 30. Stage 3 spring slicer trial (Kinston) - fruit dimensions and comments
(cultigens ranked by average quality rating).z
_________________________________________________________________________________
Cultivar Seed Length Diameter Wt. Defect1° Defect2°
Rank or line source (inch) (inch) (lb.) 2 4 6 2 4 6
_________________________________________________________________________________
1 Dasher II Mon-Seminis 8.4 2.2 0.90 K K K K G G
2 General Lee Clause-HM 8.3 2.2 0.86 K K K K T T
3 Intimidator Mon-Seminis 8.9 2.2 0.94 K G K K M G
4 G83xNC-58 NC StateUniv 8.8 2.2 0.86 M T K K D G
5 Poinsett 76 Cornell Univ 8.0 2.3 0.86 A H K V T K
6 NC-Sunshine NC StateUniv 8.9 2.5 1.21 G H K K D H
7 Panther BayerNunhems 8.8 2.3 0.94 M D K K K T
8 NC-Stratford NC StateUniv 8.4 2.3 0.82 K J D M H H
9 G83xNC-63 NC StateUniv 8.9 2.3 1.00 K D K K T G
10 Marketmore76 Check 8.6 2.3 0.97 H H H M M T
11 G83xNC-62 NC StateUniv 8.5 2.2 0.84 K G K K T G
12 Ashley Check 8.7 2.3 0.94 H M M M G H
13 G83xNC-59 NC StateUniv 8.0 2.3 0.86 K H H K T D
14 Cherokee 87 Check 7.9 2.3 0.85 A M M K H H
_________________________________________________________________________________
CV (%) 5.3 5.7 15.92
Mean 8.5 2.3 0.92
LSD (5%) 0.8 0.2 0.25
_________________________________________________________________________________
z Defects were rated as follows (giving primary and secondary for each harvest):
A - wArty fruit J – RiDGed S - Separated carpels
B - Blossom end defects K - Keep(excellent) T - Tapered ends
C - Crooks excessive L - Late maturity U - Uniform green
D - Dogbone shape M - Mottled fruit V - Varicolor (dark stem
E - Early maturity N - Nubs excessive end, light blossom end)
F - Four celled O - Offtype fruit W - White fruit
G - lonG fruit P - Placental hollows X - neCKS on fruit
H - sHort fruit Q - Y - Yellow fruit
I - strIped fruit R - Reject (poor) Z - diSeased fruit
Table 31. Stage 3 spring slicer trial (Kinston) - sex expression and vine data
(cultigens ranked by gynoecious rating).
_________________________________________________________________________________
Early Earli-
Cultivar Seed Gyn. yield ness Vine Vine
Rank or line source ratingz (cwt/A) (%)x sizew colorw
_________________________________________________________________________________
1 Intimidator Mon-Seminis 7 162 41 7 7
2 Dasher II Mon-Seminis 6 166 35 8 7
3 G83xNC-63 NC StateUniv 6 195 46 6 6
4 NC-Sunshine NC StateUniv 5 197 53 7 6
5 G83xNC-58 NC StateUniv 5 206 41 7 6
6 G83xNC-62 NC StateUniv 5 209 48 7 7
7 Panther BayerNunhems 5 139 33 7 7
8 General Lee Clause-HM 4 111 25 7 7
9 NC-Stratford NC StateUniv 4 279 45 7 7
10 Cherokee 87 Check 4 177 34 8 7
11 Poinsett 76 Cornell Univ 4 98 21 7 7
12 G83xNC-59 NC StateUniv 3 184 37 7 6
13 Marketmore76 Check 3 21 8 6 7
14 Ashley Check 3 194 35 6 7
_________________________________________________________________________________
CV (%) 24 29 17 9 13
Mean 5 167 36 7 7
LSD (5%) 2 82 10 1 1
_________________________________________________________________________________
z Gynoecious rating (1 = androecious, 2-3 = andromonoecious, 4-6 = monoecious,
7-8 = predominately gynoecious, 9 = gynoecious).
y Early yield is weight of Fancy+No.1 grade fruit produced in harvests 1 and 2.
x Earliness is the percent of the yield (Fancy + No.1 grade fruit) of 6 harvests
that was produced in harvests 1 and 2.
w Vine size & color are rated 1 (small or yellow green) to 9 (large or
dark green).
Correlation (Marketable yield with gynoecious rating) = -0.05ns
Table 32. Stage 3 spring slicer trial (Kinston) - selection indexes (cultigens
ranked by SWI1).z
_________________________________________________________________________________
Simple weighted Average rank
Cultivar Seed indexes indexes
Rank or line source SWI1 SWI2 ARI1 ARI2
_________________________________________________________________________________
1 NC-Stratford NC StateUniv 13.5 10.7 5.8 5.2
2 Dasher II Mon-Seminis 11.3 9.5 5.1 6.1
3 Ashley Check 10.9 8.9 8.0 7.8
4 G83xNC-59 NC StateUniv 10.7 8.8 8.6 8.3
5 G83xNC-58 NC StateUniv 10.4 8.4 6.5 6.4
6 G83xNC-63 NC StateUniv 10.4 8.5 7.0 6.8
7 Cherokee 87 Check 10.4 8.5 8.9 8.1
8 G83xNC-62 NC StateUniv 10.3 8.4 7.8 7.2
9 Intimidator Mon-Seminis 10.0 8.4 6.4 7.0
10 Panther BayerNunhems 9.7 8.1 7.8 8.0
11 NC-Sunshine NC StateUniv 9.5 7.8 7.9 7.4
12 General Lee Clause-HM 9.3 7.9 7.3 7.8
13 Poinsett 76 Cornell Univ 8.4 7.1 7.8 8.3
14 Marketmore76 Check 6.2 5.6 10.1 10.6
_________________________________________________________________________________
CV (%) 13.6 11.7 21.7 19.5
Mean 10.1 8.3 7.5 7.5
LSD (5%) 2.3 1.6 2.7 2.5
_________________________________________________________________________________
z SWI is simple weighted index calculated from the performance of a cultigen for
yield; earliness; fruit shape, seedcell size and overall impression; and disease
resistance. The index is calculated with 2 different methods of weighting each
trait (10 is best, 1 is worst).
ARI is the average ranking of each cultigen for yield, earliness, fruit quality
and disease resistance. The index is calculated with 2 different sets of
secondary traits added in with the primary traits (1 is best).
Correlation (Marketable yield with SWI1) = 0.90**
Correlation (Marketable yield with ARI1) = -0.46*