NCSU Cucumber Breeding Report - 2002
Todd C. Wehner
Professor
Tammy L. Ellington
Agric. Res. Tech. III
Department of Horticultural Science
North Carolina State University
Raleigh, NC 27695-7609
Summer (Stage 4) Slicing Cucumber Trial
2002
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 8 July, and harvested 4 times
(Mondays and Thursdays) between 22 August through 9 September.
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 DasherII Seminis
2 SVR14710464 Seminis
3 Intimidator Seminis
4 EX4675858 Seminis
Table 31. Stage 4 summer slicer trial - 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 DasherII Seminis 25 40 32 33 11
2 SRQS-2983 SunSeeds 16 36 35 37 10
3 SVR14710464 Seminis 15 26 38 35 12
4 EX4675858 Seminis 12 27 24 46 10
5 SRQS-2389 SunSeeds 10 17 33 39 9
6 Intimidator Seminis 9 26 27 42 11
7 NC-Sapphire NCStateUniv 9 20 26 34 9
8 NC-Stratford NCStateUniv 9 14 32 55 11
9 HMX-8416 HarrisMoran 6 10 23 46 13
10 NC-Sunshine NCStateUniv 6 10 38 43 7
11 SRQS-2387 SunSeeds 5 15 19 34 12
12 NC-Star NCStateUniv 2 3 29 60 11
_________________________________________________________________________________
LSD (5%) 16 25 37 29 6
Mean 10 20 30 42 11
CV (%) 95 75 73 41 36
_________________________________________________________________________________
Correlation (Marketable yield with % culls) = -0.37*
Table 32. Stage 4 summer slicer trial - 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 SRQS-2983 SunSeeds 7 15 18 46 20 49 23 56 26 67
2 DasherII Seminis 12 33 15 44 17 48 23 60 27 72
3 Intimidator Seminis 14 56 15 57 16 59 16 59 22 75
4 EX4675858 Seminis 8 32 11 40 11 40 13 44 16 52
5 NC-Stratford NCStateUniv 8 54 10 70 12 78 13 87 13 91
6 SVR14710464 Seminis 1 6 9 25 11 32 14 40 17 55
7 SRQS-2389 SunSeeds 4 25 7 44 7 44 7 44 10 65
8 SRQS-2387 SunSeeds 4 28 6 41 6 41 8 55 9 64
9 NC-Sapphire NCStateUniv 0 0 5 29 7 34 9 53 14 78
10 NC-Sunshine NCStateUniv 4 16 5 19 5 19 5 36 10 67
11 HMX-8416 HarrisMoran 2 23 5 48 5 52 6 54 6 63
12 NC-Star NCStateUniv 0 0 0 0 0 0 0 8 1 42
_________________________________________________________________________________
LSD (5%) 10 27 13 40 15 41 18 43 21 53
Mean 5 24 9 39 10 41 11 50 14 66
CV (%) 106 66 89 61 92 59 93 51 89 47
_________________________________________________________________________________
Correlation (Marketable yield with yield in harvests 1-2) = 0.91**
Correlation (Marketable yield with % of yield in harvests 1-2) = 0.22ns
Table 33. Stage 4 summer slicer trial - fruit quality data (cultigens ranked
by average quality).z
_________________________________________________________________________________
Cultivar Seed Average Seed- Overall
Rank or line source quality Shape Color cell impression
_________________________________________________________________________________
1 HMX-8416 HarrisMoran 7.2 7 8 8 7
2 SVR14710464 Seminis 7.2 7 8 8 7
3 NC-Stratford NCStateUniv 6.8 7 8 7 7
4 DasherII Seminis 6.7 7 8 7 6
5 NC-Sunshine NCStateUniv 6.6 6 7 7 7
6 Intimidator Seminis 6.4 6 8 7 6
7 EX4675858 Seminis 6.2 6 7 6 6
8 SRQS-2389 SunSeeds 6.0 6 8 6 6
9 NC-Sapphire NCStateUniv 5.9 5 7 7 5
10 SRQS-2387 SunSeeds 5.8 5 8 7 6
11 SRQS-2983 SunSeeds 5.6 5 8 6 5
12 NC-Star NCStateUniv 5.2 5 8 6 5
_________________________________________________________________________________
LSD (5%) 1.3 1 1 2 1
Mean 6.2 6 8 7 6
CV (%) 12.5 12 7 18 14
_________________________________________________________________________________
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) = 0.07ns
Table 34. Stage 4 summer slicer trial - fruit dimensions and comments
(cultigens ranked by average quality rating).z
_________________________________________________________________________________
Cultivar Seed Length Diameter Wt. Defect1° Defect2°
Rank or line source (0.1") (0.1") (lb.) 2 4 6 2 4 6
_________________________________________________________________________________
1 HMX-8416 HarrisMoran 6.4 1.8 0.43 K C H C K K
2 SVR14710464 Seminis 6.3 1.6 0.48 T K K M C H
3 NC-Stratford NCStateUniv 6.2 1.8 0.48 K K H D H T
4 DasherII Seminis 6.6 1.9 0.50 H H K K K H
5 NC-Sunshine NCStateUniv 6.9 1.9 0.45 H K K T T T
6 Intimidator Seminis 6.7 1.8 0.54 H H H T K K
7 EX4675858 Seminis 6.8 1.7 0.46 H H K K T K
8 SRQS-2389 SunSeeds 5.8 1.8 0.42 H K K D H H
9 NC-Sapphire NCStateUniv 5.8 1.7 0.50 P H H D K D
10 SRQS-2387 SunSeeds 5.6 1.7 0.37 H K K K H H
11 SRQS-2983 SunSeeds 6.9 1.8 0.50 M H T D K D
12 NC-Star NCStateUniv 5.2 1.5 0.47 H H H D T T
_________________________________________________________________________________
LSD (5%) 1.0 0.2 0.15
Mean 6.2 1.7 0.46
CV (%) 9.6 9.2 19.81
_________________________________________________________________________________
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 35. Stage 4 summer slicer trial - 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 Seminis 9 15 57 7 7
2 SRQS-2389 SunSeeds 9 7 44 6 8
3 HMX-8416 HarrisMoran 9 5 48 6 7
4 SRQS-2983 SunSeeds 9 18 46 7 7
5 SRQS-2387 SunSeeds 8 6 41 6 8
6 EX4675858 Seminis 7 11 40 7 7
7 SVR14710464 Seminis 7 9 25 6 7
8 DasherII Seminis 7 15 44 6 8
9 NC-Sunshine NCStateUniv 6 5 19 4 8
10 NC-Sapphire NCStateUniv 3 5 29 6 7
11 NC-Stratford NCStateUniv 3 10 70 6 6
12 NC-Star NCStateUniv 2 0 0 4 7
_________________________________________________________________________________
LSD (5%) 2 13 40 1 1
Mean 7 9 39 6 7
CV (%) 19 89 61 14 10
_________________________________________________________________________________
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) = 0.25ns
Table 36. Stage 4 summer slicer trial - disease ratings (cultigens ranked
by average disease resistance).z
_________________________________________________________________________________
Cultivar Seed Average Anthrac- Powdery
Rank or line source disease nose mildew
_________________________________________________________________________________
1 EX4675858 Seminis 0.8 2 0
2 Intimidator Seminis 1.0 2 0
3 SRQS-2983 SunSeeds 1.8 2 1
4 HMX-8416 HarrisMoran 1.8 4 0
5 SVR14710464 Seminis 2.0 3 1
6 SRQS-2387 SunSeeds 2.0 3 1
7 DasherII Seminis 2.7 3 2
8 NC-Sapphire NCStateUniv 3.3 4 3
9 NC-Star NCStateUniv 3.5 5 2
10 SRQS-2389 SunSeeds 3.7 3 5
11 NC-Sunshine NCStateUniv 4.3 4 4
12 NC-Stratford NCStateUniv 5.2 4 6
_________________________________________________________________________________
LSD (5%) 2.2 1 4
Mean 2.6 3 2
CV (%) 49.3 24 109
_________________________________________________________________________________
z Disease rated 0 to 9 (0=none, 1-2=trace, 3-4=slight, 5-6=moderate, 7-8=advanced,
9=plant dead).
Correlation (Marketable yield with anthracnose rating) = -0.34**
Table 37. Stage 4 summer slicer trial - selection indexes (cultigens ranked
by SWI1).z
_________________________________________________________________________________
Simple weighted Average rank
Cultivar Seed indexes indexes___
Rank or line source SWI1 SWI2 ARI1 ARI2
_________________________________________________________________________________
1 DasherII Seminis 3.9 4.2 5.2 5.4
2 SVR14710464 Seminis 3.9 4.0 4.7 5.3
3 Intimidator Seminis 3.9 4.4 5.0 4.4
4 EX4675858 Seminis 3.8 4.1 5.7 5.1
5 HMX-8416 HarrisMoran 3.7 4.2 5.7 5.9
6 SRQS-2983 SunSeeds 3.7 4.0 6.3 5.8
7 NC-Stratford NCStateUniv 3.3 4.1 5.8 6.4
8 SRQS-2387 SunSeeds 3.3 3.7 7.6 7.2
9 SRQS-2389 SunSeeds 3.2 3.7 6.6 6.6
10 NC-Sapphire NCStateUniv 3.2 3.4 7.6 7.5
11 NC-Sunshine NCStateUniv 3.1 3.2 7.4 8.0
12 NC-Star NCStateUniv 2.8 2.6 10.4 10.4
_________________________________________________________________________________
LSD (5%) 0.6 0.8 3.3 2.8
Mean 3.4 3.8 6.5 6.5
CV (%) 9.8 12.2 30.2 25.1
_________________________________________________________________________________
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) = 0.68**
Correlation (Marketable yield with ARI1) = -0.51**