NCSU Cucumber Breeding Report - 2001
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
2001
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 16 July, and harvested 4 times
(Mondays and Thursdays) between 30 August through 10 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 EX4675898 Seminis
2 SCU 6601 Sakata
3 Poinsett 76 CornellUniv
4 HMX-8416 HarrisMoran
5 General Lee (4440) HarrisMoran
6 EX4674277 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 EX4675898 Seminis 39 78 24 47 26
2 Poinsett 76 CornellUniv 38 74 33 3 26
3 SCU 6601 Sakata 38 76 33 31 26
4 HMX-8416 HarrisMoran 23 44 21 57 24
5 EX4674277 Seminis 15 42 20 45 26
6 XP3501217 Seminis 13 40 21 49 25
7 GeneralLee4440 HarrisMoran 12 28 15 63 26
8 Cherokee 7 Check 10 16 31 12 5
9 SRQS-2387 SunSeeds 8 24 11 62 24
10 Dasher II Seminis 6 19 13 57 25
11 Speedway Seminis 6 23 9 34 22
12 Marketmore 76 Check 2 3 19 68 25
13 Ashley Check 1 12 5 30 8
14 SRQS-2653 SunSeeds 1 1 5 62 25
_________________________________________________________________________________
LSD (5%) 31 54 27 40 3
Mean 15 34 18 44 22
CV (%) 121 94 87 54 8
_________________________________________________________________________________
Correlation (Marketable yield with % culls) = -0.36*
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 EX4675898 Seminis 29 35 74 96 78 100 78 100 78 100
2 SCU 6601 Sakata 15 22 72 93 73 98 76 100 76 100
3 Poinsett 76 CornellUniv 9 8 42 37 70 62 74 67 74 67
4 XP3501217 Seminis 13 25 39 99 40 100 40 100 40 100
5 HMX-8416 HarrisMoran 10 22 36 77 41 82 44 100 44 100
6 EX4674277 Seminis 5 14 27 71 42 100 42 100 42 100
7 SRQS-2387 SunSeeds 11 30 24 100 24 100 24 100 24 100
8 Speedway Seminis 5 26 22 64 23 66 23 67 23 67
9 GeneralLee4440 HarrisMoran 7 59 20 77 26 90 28 100 28 100
10 Dasher II Seminis 8 36 19 97 19 97 19 100 19 100
11 Cherokee 7 Check 5 20 14 57 16 67 16 67 16 67
12 Ashley Check 1 5 10 91 12 100 12 100 12 100
13 Marketmore 76 Check 2 67 3 100 3 100 3 100 3 100
14 SRQS-2653 SunSeeds 0 0 1 33 1 33 1 33 1 33
_________________________________________________________________________________
LSD (5%) 15 45 44 50 53 52 52 50 54 50
Mean 9 26 29 78 33 85 34 88 34 88
CV (%) 104 102 92 38 95 36 94 34 94 34
_________________________________________________________________________________
Correlation (Marketable yield with yield in harvests 1-2) = 0.96**
Correlation (Marketable yield with % of yield in harvests 1-2) = 0.16ns
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 Poinsett 76 CornellUniv 7.0 8 8 7 7
2 HMX-8416 HarrisMoran 7.0 7 9 7 7
3 GeneralLee4440 HarrisMoran 6.8 7 8 6 7
4 EX4675898 Seminis 6.3 7 8 5 7
5 SCU 6601 Sakata 6.1 6 9 6 6
6 EX4674277 Seminis 6.0 6 9 6 6
7 Marketmore 76 Check 5.9 5 7 7 5
8 Ashley Check 5.8 6 7 5 6
9 XP3501217 Seminis 5.8 5 8 7 5
10 Dasher II Seminis 5.4 5 8 7 5
11 Speedway Seminis 5.2 6 7 4 6
12 Cherokee 7 Check 5.1 5 6 5 5
13 SRQS-2387 SunSeeds 4.7 5 5 5 5
14 SRQS-2653 SunSeeds 4.7 4 5 6 4
_________________________________________________________________________________
LSD (5%) 1.2 1 1 1 1
Mean 5.8 6 7 6 6
CV (%) 12.4 15 8 14 15
_________________________________________________________________________________
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) = 0.32*
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 Poinsett 76 CornellUniv 7.4 2.1 0.71 H H H K K K
2 HMX-8416 HarrisMoran 8.5 2.0 0.69 K T K T K T
3 GeneralLee4440 HarrisMoran 7.9 2.0 0.71 D T D T C T
4 EX4675898 Seminis 8.5 2.1 0.78 G T G D D D
5 SCU 6601 Sakata 8.1 2.2 0.78 T T T H H H
6 EX4674277 Seminis 7.9 2.1 0.69 H T H T K T
7 Marketmore 76 Check 6.9 2.0 0.52 H C H C H C
8 Ashley Check 6.9 2.1 0.67 M M M H H H
9 XP3501217 Seminis 8.0 2.0 0.67 T H T D D D
10 Dasher II Seminis 7.8 2.1 0.70 D C D N H N
11 Speedway Seminis 7.8 2.1 0.71 H M H C H C
12 Cherokee 7 Check 7.3 1.9 0.68 M K M H H H
13 SRQS-2387 SunSeeds 7.6 2.0 0.69 T C T D H D
14 SRQS-2653 SunSeeds 7.0 1.9 0.57 C T C M C M
_________________________________________________________________________________
LSD (5%) 0.8 0.1 0.13
Mean 7.7 2.0 0.68
CV (%) 6.7 4.3 11.48
_________________________________________________________________________________
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 EX4675898 Seminis 8 74 96 8 7
2 GeneralLee4440 HarrisMoran 8 20 77 8 8
3 EX4674277 Seminis 8 27 71 7 6
4 HMX-8416 HarrisMoran 8 36 77 7 7
5 SRQS-2653 SunSeeds 8 1 33 7 7
6 XP3501217 Seminis 7 39 99 8 6
7 SRQS-2387 SunSeeds 7 24 100 6 7
8 Dasher II Seminis 7 19 97 7 7
9 Cherokee 7 Check 7 14 57 6 8
10 SCU 6601 Sakata 6 72 93 8 7
11 Speedway Seminis 6 22 64 6 7
12 Poinsett 76 CornellUniv 5 42 37 7 7
13 Ashley Check 5 10 91 5 6
14 Marketmore 76 Check 4 3 100 6 6
_________________________________________________________________________________
LSD (5%) 2 44 50 1 2
Mean 7 29 78 7 7
CV (%) 16 92 38 12 15
_________________________________________________________________________________
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) = 0.29ns
Table 36. Stage 4 summer slicer trial - disease ratings (cultigens ranked
by anthracnose resistance).z
_________________________________________________________________________________
Cultivar Seed Anthrac-
Rank or line source nose
_________________________________________________________________________________
1 HMX-8416 HarrisMoran 4.7
2 Poinsett 76 CornellUniv 4.7
3 EX4675898 Seminis 5.7
4 Cherokee 7 Check 6.0
5 SCU 6601 Sakata 6.0
6 Ashley Check 6.0
7 SRQS-2387 SunSeeds 6.3
8 GeneralLee4440 HarrisMoran 6.7
9 Dasher II Seminis 7.0
10 EX4674277 Seminis 7.7
11 XP3501217 Seminis 7.7
12 Speedway Seminis 7.7
13 Marketmore 76 Check 8.0
14 SRQS-2653 SunSeeds 8.3
_______________________________________________________________________________
LSD (5%) 1.8
Mean 6.6
CV (%) 16.5
_________________________________________________________________________________
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) = -0.70**
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 EX4675898 Seminis 4.6 5.2 4.9 4.9
2 SCU 6601 Sakata 4.5 5.0 5.0 5.1
3 Poinsett 76 CornellUniv 4.4 4.4 4.7 5.5
4 HMX-8416 HarrisMoran 4.1 4.7 3.9 4.5
5 GeneralLee4440 HarrisMoran 3.3 4.1 6.1 6.9
6 XP3501217 Seminis 3.1 4.1 7.6 7.5
7 EX4674277 Seminis 3.1 3.7 7.2 7.5
8 Ashley Check 2.7 3.9 8.4 8.2
9 Dasher II Seminis 2.7 3.8 8.5 8.0
10 Cherokee 7 Check 2.7 3.3 8.6 8.3
11 SRQS-2387 SunSeeds 2.6 3.8 9.6 8.5
12 Speedway Seminis 2.6 3.2 9.3 9.3
13 Marketmore 76 Check 2.3 3.6 9.3 8.9
14 SRQS-2653 SunSeeds 1.8 2.2 11.9 11.9
_________________________________________________________________________________
LSD (5%) 1.8 1.3 3.2 3.3
Mean 3.7 3.9 7.5 7.5
CV (%) 26.6 21.0 26.0 26.7
_________________________________________________________________________________
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) = 0.96**
Correlation (Marketable yield with ARI1) = -0.71**