NCSU Cucumber Breeding Report - 2006
Todd C. Wehner
Professor
Tammy L. Ellington
Agric. Res. Tech. III
Department of Horticultural Science
North Carolina State University
Raleigh, NC 27695-7609
Preliminary (Stage 1) Slicer Cucumber Trial
2006
Todd C. Wehner and Tammy L. Ellington
Experiment Design
1. A randomized complete block with 2 replications of pickle cultivars
and breeding lines (collectively referred to as cultigens) was grown.
2. Plots were single 5 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 26 April, and harvested 2 times
29 June and 6 July.
Data Collection
1. Firmness was measured on 3 Grade 3 fruits using a Magness-Taylor tester
with a 5/16" tip.
2. Length/Diameter ratio was calculated by measuring 5 Grade 2 fruits.
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:
01 Cherokee 7 Clemson Univ.
02 NC-59 NCState Univ.
03 Dasher II Seminis
04 Marketmore 86 Cornell Univ.
05 NC-63 NCState Univ.
06 WS-3048 Western Seed
Table 21. Stage 1 spring slicer trial - yield data (cultigens are ranked
by number of marketable fruits per plot).
_________________________________________________________________________________
No. fruits per plot Fruit
Cultivar Seed Mark- Early % per
Rank or line source able Total (OSize) cull plant
_________________________________________________________________________________
1 Cherokee 7 Check 52 76 14 30 2.5
2 NC-59 NCState Univ. 47 60 17 22 2.0
3 Dasher II Seminis 45 58 14 23 1.9
4 Marketmore 86 Cornell Univ. 35 60 12 40 2.0
5 Marketmore 76 Check 35 41 3 15 1.4
6 Ashley Check 34 48 5 27 3.1
7 Poinsett 83F NCState Univ. 33 57 9 42 1.9
8 WS-3048 Western Seed 33 51 10 35 1.7
9 Poinsett 76 Cornell Univ. 33 42 10 21 1.7
10 NC-63 NCState Univ. 30 69 17 55 2.3
11 WS-3050 Western Seed 30 45 11 34 1.8
12 NC-58 NCState Univ. 28 51 9 44 2.6
13 WS-3049 Western Seed 23 42 6 46 1.6
14 NC-62 NCState Univ. 21 49 12 57 1.6
15 Straight 8 Check 21 36 6 41 1.5
16 Marketmore 85 Cornell Univ. 18 30 4 40 1.3
_________________________________________________________________________________
CV (%) 18 19 38 15 19
Mean 32 51 8 36 1.9
LSD (5%) 12 21 8 11 0.8
_________________________________________________________________________________
Correlation (Total yield with % culls) = 0.22ns
Table 22. Stage 1 spring slicer trial - fruit and disease data (cultigens are
ranked by fruit length).
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Cultivar Seed LD Length Diam. Frt.Wt. Disease rating
Rank or line source ratio (in.) (in.) (lb.) DM Anth.
_________________________________________________________________________________
1 WS-3050 Western Seed 4.3 9.4 2.2 2.5 1.0 0.5
2 WS-3048 Western Seed 4.0 8.8 2.2 2.8 2.0 0.0
3 WS-3049 Western Seed 4.1 8.6 2.1 2.6 2.0 1.5
4 NC-63 NCState Univ. 3.7 8.4 2.3 2.6 3.0 1.0
5 Marketmore 86 Cornell Univ. 3.8 8.3 2.2 2.5 4.0 0.0
6 Marketmore 85 Cornell Univ. 3.9 8.3 2.1 2.5 4.5 3.0
7 NC-62 NCState Univ. 3.9 8.2 2.1 2.4 3.5 1.0
8 Poinsett 83F NCState Univ. 3.6 8.0 2.2 2.0 4.5 0.0
9 Cherokee 7 Check 3.9 7.9 2.1 2.1 2.0 0.0
10 Dasher II Seminis 3.6 7.9 2.2 2.3 5.0 1.0
11 NC-58 NCState Univ. 4.1 7.7 1.9 2.0 3.0 0.0
12 Straight 8 Check 3.7 7.5 2.1 2.0 6.5 3.0
13 Poinsett 76 Cornell Univ. 4.2 7.4 1.7 1.5 2.0 0.0
14 NC-59 NCState Univ. 3.2 7.0 2.2 2.3 1.5 0.5
15 Ashley Check 3.9 6.8 1.8 1.3 4.5 2.0
16 Marketmore 76 Check 4.2 6.1 1.4 0.8 4.5 1.5
_________________________________________________________________________________
CV (%) 5 7 7 17 29 155
Mean 3.9 7.9 2.0 2.1 3.3 0.9
LSD (5%) 0.4 1.2 0.3 0.8 2.1 3.1
_________________________________________________________________________________
z Quality rated 1 to 9 (1 = poor, 5 = average, 9 = excellent).
y Color rated 1 to 9 (1 = white, 5 = medium green, 9 = very dark green).
Correlation (Total yield with DM rating) = -0.13ns
Table 23. Stage 1 spring slicer trial - fruit quality data (cultigens are ranked
by average fruit quality).
_________________________________________________________________________________
Overall
Cultivar Seed Average Seed- impres-
Rank or line source qualityz Shapez Colory cellz sionz
_________________________________________________________________________________
1 WS-3048 Western Seed 7.5 8 8 7 8
2 WS-3049 Western Seed 7.5 8 8 7 8
3 Marketmore 86 Cornell Univ. 7.2 8 7 7 8
4 Marketmore 85 Cornell Univ. 7.0 8 8 7 7
5 WS-3050 Western Seed 7.0 7 8 7 8
6 NC-63 NCState Univ. 7.0 7 9 7 8
7 NC-62 NCState Univ. 6.8 7 9 7 7
8 NC-58 NCState Univ. 6.8 7 9 8 7
9 Dasher II Seminis 6.8 7 7 6 8
10 Cherokee 7 Check 6.5 6 7 7 7
11 NC-59 NCState Univ. 6.2 7 7 5 7
12 Poinsett 83F NCState Univ. 5.7 6 8 6 5
13 Poinsett 76 Cornell Univ. 5.7 6 8 5 6
14 Marketmore 76 Check 5.7 4 6 8 5
15 Ashley Check 5.5 6 7 5 6
16 Straight 8 Check 4.5 5 3 6 3
_________________________________________________________________________________
CV (%) 8 11 9 17 11
Mean 6.5 7 7 6 6
LSD (5%) 1.1 2 1 2 2
_________________________________________________________________________________
z Quality rated 1 to 9 (1 = poor, 5 = average, 9 = excellent).
y Color rated 1 to 9 (1 = white, 5 = medium green, 9 = very dark green).
Correlation (Total yield with average quality) = 0.10ns
Table 24. Stage 1 spring slicer trial - primary and secondary fruit defects
in replications 1 and 2 (cultigens ranked by fruit quality).z
_________________________________________________________________________________
Primary Secondary
Cultivar Seed Average defects defects
Rank or line source quality Rep 1 Rep 2 Rep 1 Rep 2
_________________________________________________________________________________
1 WS-3048 Western Seed 7.5 K K K T
2 WS-3049 Western Seed 7.5 K K K T
3 Marketmore 86 Cornell Univ. 7.2 K K G T
4 Marketmore 85 Cornell Univ. 7.0 K M H H
5 WS-3050 Western Seed 7.0 K K G H
6 NC-63 NCState Univ. 7.0 K K T D
7 NC-62 NCState Univ. 6.8 K K T H
8 NC-58 NCState Univ. 6.8 K K T K
9 Dasher II Seminis 6.8 K K K K
10 Cherokee 7 Check 6.5 K M M T
11 NC-59 NCState Univ. 6.2 K K H H
12 Poinsett 83F NCState Univ. 5.7 D K T H
13 Poinsett 76 Cornell Univ. 5.7 K K H H
14 Marketmore 76 Check 5.7 M M T T
15 Ashley Check 5.5 K M T T
16 Straight 8 Check 4.5 M W H T
_________________________________________________________________________________
CV (%) 8
Mean 6.5
LSD (5%) 1.1
_________________________________________________________________________________
z Quality rated 1 to 9 (1 = poor, 5 = average, 9 = excellent).
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 25. Stage 1 spring slicer trial - selection indexes (cultigens ranked
by SWI1).z
_________________________________________________________________________________
Cultivar Seed Mark. Early Fruit Seed Over
Rank or line source SWI1 SWI2 yield yield shape cell -all
_________________________________________________________________________________
1 Cherokee 7 Check 12.6 10.6 52 14 6 7 7
2 NC-59 NCState Univ. 12.0 10.4 47 17 7 5 7
3 Dasher II Seminis 12.0 10.5 45 14 7 6 8
4 Marketmore 86 Cornell Univ. 10.4 9.5 35 12 8 7 8
5 NC-63 NCState Univ. 10.0 9.2 30 17 7 7 8
6 WS-3048 Western Seed 10.0 9.2 33 10 8 7 8
7 WS-3050 Western Seed 9.2 8.4 30 11 7 7 8
8 Poinsett 83F NCState Univ. 9.1 8.0 33 9 6 6 5
9 Poinsett 76 Cornell Univ. 9.1 8.0 33 10 6 5 6
10 Ashley Check 8.8 7.7 34 5 6 5 6
11 NC-58 NCState Univ. 8.6 7.9 28 9 7 8 7
12 Marketmore 76 Check 8.5 7.2 35 3 4 8 5
13 NC-62 NCState Univ. 8.1 7.8 21 12 7 7 7
14 WS-3049 Western Seed 8.0 7.7 23 6 8 7 8
15 Marketmore 85 Cornell Univ. 7.0 6.9 18 4 8 7 7
16 Straight 8 Check 6.5 5.9 21 6 5 6 3
_________________________________________________________________________________
CV (%) 11 9 18 38 11 17 11
Mean 9.4 8.4 32 8 7 6 6
LSD (5%) 2.1 1.7 12 8 2 2 2
_________________________________________________________________________________
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).
Correlation (Total yield with SWI1) = 0.76**
Correlation (Total yield with SWI2) = 0.74**