Summer (Stage 4) Slicing Cucumber Trial – 2001

NCSU Cucumber Breeding Report - 2001cuke.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
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**