Preliminary (Stage 1) Slicer Cucumber Trial – 2006

NCSU Cucumber Breeding Report - 2006
					cuke.gif

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).
_________________________________________________________________________________
       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**