Summer (Stage 4) Slicing Cucumber Trial – 2007

NCSU Cucumber Breeding Report - 2007cuke.gif

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
2007
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 9 July, and harvested 4 times
     (Mondays and Thursdays) between 20 August and 7 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:

01   G83xNC-59                       NCStateUniv
02   PX147-10896                     Seminis    
03   G83xNC-63                       NCStateUniv
04   G83xNC-62                       NCStateUniv
05   G83xNC-58                       NCStateUniv
06   WSA-9119                        WesternSeed



Table 27.  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    G83xNC-59       NCStateUniv       67      137       31       31       26
  2    WSA-9119        WesternSeed       35       72       33       32       26
  3    PX147-10896     Seminis           35       79       25       37       26
  4    G83xNC-62       NCStateUniv       34       60       34       41       25
  5    G83xNC-63       NCStateUniv       34       63       34       37       25
  6    G83xNC-58       NCStateUniv       32       65       28       43       26

  7    Cherokee 87     Check             32       61       24       53       26
  8    General Lee     HarrisMoran       31       67       27       38       26
  9    Dasher II       Seminis           26       48       29       45       26
 10    NC-Sunshine     NCStateUniv       26       60       22       47       26
 11    Ashley          Check             17       29       32       16        8
 12    NC-Stratford    NCStateUniv       17       44       18       54       26

 13    WSA-8119        WesternSeed       17       32       28       44       26
 14    PX147-10885     Seminis           16       37       27       34       23
 15    Panther         Nunhems           13       35       23       38       26
 16    G57xNC-59       NCStateUniv        5       13        5       18        9
 17    G57xNC-63       NCStateUniv        4       15        4       19        9
 18    G57xNC-58       NCStateUniv        1        3        2       29        9
_________________________________________________________________________________
       CV (%)                            91       72       57       46       29
       Mean                              25       51       24       36       22
       LSD (5%)                          37       61       23       28       10
_________________________________________________________________________________
Correlation (Marketable yield with % culls) = 0.02ns



Table 28.  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 NC-Sunshine  NCStateUniv    6    5   21   32   38   60   46   76   53   93
  2 G83xNC-62    NCStateUniv    0    0   20   39   36   64   45   77   56   93
  3 PX147-10896  Seminis        0    0   19   33   46   60   54   68   68   89
  4 G83xNC-58    NCStateUniv    0    0    9   10   30   34   43   62   53   88
  5 G83xNC-63    NCStateUniv    2    2    8   13   17   25   33   49   55   88
  6 NC-Stratford NCStateUniv    2    4    6   15   18   40   31   72   41   94

  7 G83xNC-59    NCStateUniv    1    0    6    3   37   19   76   47  121   85
  8 G57xNC-59    NCStateUniv    0    0    6   14   10   26   11   28   13   33
  9 PX147-10885  Seminis        2    4    4    9    7   14   16   37   31   84
 10 WSA-9119     WesternSeed    1    1    4    5   22   22   39   52   60   83
 11 General Lee  HarrisMoran    0    0    3    6   23   38   38   56   55   81
 12 Cherokee 87  Check          1    1    3    4   10   17   30   47   52   85

 13 Dasher II    Seminis        0    0    3    7   10   21   27   55   39   81
 14 G57xNC-58    NCStateUniv    1   14    2   18    3   26    3   26    3   29
 15 WSA-8119     WesternSeed    0    0    2    4    2    5    5   14   23   74
 16 G57xNC-63    NCStateUniv    0    0    1    3    7   15    8   18   10   23
 17 Panther      Nunhems        0    0    1    3    2    7   11   34   21   67
 18 Ashley       Check          0    0    0    0    1    2    6   14   21   49
_________________________________________________________________________________
    CV (%)                    329  371  120  126  106   79   91   53   73   34
    Mean                        1    2    6   12   18   28   29   46   43   73
    LSD (5%)                    5   11   13   25   31   36   44   41   52   41
_________________________________________________________________________________
Correlation (Marketable yield with yield in harvests 1-2)      = 0.36**
Correlation (Marketable yield with % of yield in harvests 1-2) = 0.04ns



Table 29.  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   PX147-10896    Seminis          7.2        8       8       7       7
     2   G83xNC-58      NCStateUniv      6.9        7       8       7       7
     3   Dasher II      Seminis          6.8        6       7       8       6
     4   NC-Stratford   NCStateUniv      6.8        6       7       8       6
     5   G83xNC-59      NCStateUniv      6.7        6       7       7       7
     6   G83xNC-63      NCStateUniv      6.6        6       8       7       6

     7   NC-Sunshine    NCStateUniv      6.6        6       8       8       6
     8   WSA-9119       WesternSeed      6.6        6       8       7       6
     9   G83xNC-62      NCStateUniv      6.4        6       9       7       6
    10   PX147-10885    Seminis          6.4        6       9       7       6
    11   General Lee    HarrisMoran      6.2        6       7       7       6
    12   Ashley         Check            6.0        6       4       7       5

    13   WSA-8119       WesternSeed      6.0        5       7       8       5
    14   Panther        Nunhems          5.9        5       6       8       4
    15   G57xNC-58      NCStateUniv      5.6        5       9       7       5
    16   Cherokee 87    Check            5.4        5       6       6       5
    17   G57xNC-63      NCStateUniv      5.3        5       6       6       4
    18   G57xNC-59      NCStateUniv      4.8        4       6       6       4
_________________________________________________________________________________
         CV (%)                          9.8       16      12      11      16
         Mean                            6.2        6       7       7       6
         LSD (5%)                        1.0        2       2       1       2
_________________________________________________________________________________
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) = 0.30*



Table 30.  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      (inch)  (inch)  (lb.)  2   4   6   2   4   6
_________________________________________________________________________________
 1   PX147-10896    Seminis         7.3     2.0    0.58   A   K   H   T   T   T
 2   G83xNC-58      NCStateUniv     7.5     1.9    0.60   K   K   K   T   T   T
 3   Dasher II      Seminis         6.7     1.8    0.44   C   H   H   H   T   T
 4   NC-Stratford   NCStateUniv     6.9     1.9    0.52   D   D   H   H   H   T
 5   G83xNC-59      NCStateUniv     7.3     2.0    0.65   M   D   K   T   H   H
 6   G83xNC-63      NCStateUniv     7.0     1.9    0.55   D   H   K   H   T   T

 7   NC-Sunshine    NCStateUniv     7.0     1.9    0.57   A   D   D   K   H   H
 8   WSA-9119       WesternSeed     7.4     1.8    0.53   D   K   G   T   T   T
 9   G83xNC-62      NCStateUniv     7.6     1.9    0.57   D   K   K   K   T   T
10   PX147-10885    Seminis         6.7     2.0    0.38   D   C   G   T   T   T
11   General Lee    HarrisMoran     7.3     1.8    0.49   D   H   K   T   T   T
12   Ashley         Check           7.3     1.8    0.55   M   M   M   H   H   H

13   WSA-8119       WesternSeed     6.6     1.5    0.33   D   D   T   H   T   D
14   Panther        Nunhems         6.5     1.7    0.37   D   D   H   H   H   T
15   G57xNC-58      NCStateUniv     6.6     1.9    0.47   D   D   D   H   H   H
16   Cherokee 87    Check           6.7     1.9    0.51   M   D   M   D   M   T
17   G57xNC-63      NCStateUniv     6.0     1.8    0.35   H   D   D   T   H   H
18   G57xNC-59      NCStateUniv     6.5     1.9    0.51   D   M   M   H   D   D
_________________________________________________________________________________
     CV (%)                         6.1    10.3   13.99
     Mean                           6.9     1.8    0.50
     LSD (5%)                       0.7     0.3    0.12
_________________________________________________________________________________
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 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    G57xNC-63       NCStateUniv        9        1        3        7        7
  2    PX147-10885     Seminis            8        4        9        8        8
  3    PX147-10896     Seminis            8       19       33        8        7
  4    G57xNC-59       NCStateUniv        8        6       14        7        6
  5    G57xNC-58       NCStateUniv        8        2       18        5        7
  6    WSA-8119        WesternSeed        7        2        4        8        8

  7    G83xNC-62       NCStateUniv        7       20       39        7        6
  8    Cherokee 87     Check              6        3        4        6        7
  9    G83xNC-63       NCStateUniv        6        8       13        6        6
 10    NC-Sunshine     NCStateUniv        6       21       32        5        5
 11    Dasher II       Seminis            6        3        7        8        7
 12    Panther         Nunhems            6        1        3        6        8

 13    General Lee     HarrisMoran        5        3        6        8        8
 14    G83xNC-59       NCStateUniv        5        6        3        7        5
 15    G83xNC-58       NCStateUniv        5        9       10        7        6
 16    NC-Stratford    NCStateUniv        5        6       15        6        5
 17    WSA-9119        WesternSeed        5        4        5        7        8
 18    Ashley          Check              4        0        0        6        7
_________________________________________________________________________________
       CV (%)                            17      120      126       14       15
       Mean                               6        6       12        7        7
       LSD (5%)                           2       13       25        2        2
_________________________________________________________________________________
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) = -0.32*



Table 32.  Stage 4 summer slicer trial - disease ratings (cultigens ranked
by average disease resistance).z
_________________________________________________________________________________
                   Cultivar            Seed                 Downy
           Rank     or line           source                mildew
_________________________________________________________________________________
             1    G83xNC-63         NCStateUniv              1.0
             2    WSA-8119          WesternSeed              1.3
             3    Cherokee 87       Check                    1.7
             4    Dasher II         Seminis                  1.7
             5    Ashley            Check                    1.7
             6    G57xNC-63         NCStateUniv              2.0

             7    Panther           Nunhems                  2.0
             8    WSA-9119          WesternSeed              2.0
             9    PX147-10885       Seminis                  2.7
            10    General Lee       HarrisMoran              2.7
            11    G83xNC-59         NCStateUniv              2.7
            12    G83xNC-58         NCStateUniv              2.7

            13    PX147-10896       Seminis                  3.0
            14    G83xNC-62         NCStateUniv              3.3
            15    NC-Stratford      NCStateUniv              3.3
            16    NC-Sunshine       NCStateUniv              5.0
            17    G57xNC-59         NCStateUniv              6.0
            18    G57xNC-58         NCStateUniv              7.0
_________________________________________________________________________________
                  CV (%)                                    38.9
                  Mean                                       2.9
                  LSD (5%)                                   1.9
_________________________________________________________________________________
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 disease rating) = -0.17ns



Table 33.  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    G83xNC-59       NCStateUniv      4.4      4.0      7.8      7.7
       2    PX147-10896     Seminis          4.4      4.2      5.9      6.1
       3    G83xNC-63       NCStateUniv      4.2      3.9      6.5      6.2
       4    G83xNC-62       NCStateUniv      4.0      4.0      7.9      7.7
       5    G83xNC-58       NCStateUniv      4.0      3.7      7.7      8.2
       6    WSA-9119        WesternSeed      4.0      3.6      8.3      8.6

       7    Dasher II       Seminis          3.9      3.5      7.1      7.3
       8    General Lee     HarrisMoran      3.7      3.4      9.6      9.1
       9    NC-Sunshine     NCStateUniv      3.7      3.6      8.8      9.0
      10    PX147-10885     Seminis          3.6      3.3      9.2      9.4
      11    WSA-8119        WesternSeed      3.6      3.2      9.6      9.8
      12    NC-Stratford    NCStateUniv      3.6      3.4      7.9      8.2

      13    Cherokee 87     Check            3.6      3.2     10.6      9.8
      14    Ashley          Check            3.4      3.0     11.0     11.2
      15    Panther         Nunhems          3.4      3.0     11.1     11.0
      16    G57xNC-63       NCStateUniv      3.1      2.7     12.8     12.4
      17    G57xNC-58       NCStateUniv      2.4      2.4     14.1     14.4
      18    G57xNC-59       NCStateUniv      2.4      2.3     15.3     14.9
_________________________________________________________________________________
            CV (%)                          12.4     13.8     21.8     22.5
            Mean                             3.6      3.3      9.5      9.5
            LSD (5%)                         0.7      0.8      3.4      3.5
_________________________________________________________________________________
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) = 0.81**
Correlation (Marketable yield with ARI1) = -0.56**