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Cucurbit Genetics Cooperative Report 20:60-62 (article 27) 1997

Evaluation of Gherkin Germplasm

M.S. Dhaliwal

Department of Vegetable Crops, Punjab Agricultural University, Ludhiana-141 004, India

Introduction. Gherkin, burgherkin or West Indian gherkin is botanically known as Cucumis anguria L. and is a diploid species having chromosome number 2n=24. It has descended from a non-bitter variant of an African wild species C. longipes Hook, which bears bitter fruits. Fruits of gherkin are small, egg-shaped and are borne on a long peduncle. The fruits can be consumed fresh in salads, processed in pickles or cooked as a vegetable (1). Gherkin is not grown in this part of India, so an effort has been made to evaluate this germplasm under Punjab conditions.

Material and Methods. Forty-eight lines of gherkin were introduced from North Central Regional Plant Introduction Station, Ames during 1994. These genotypes were grown at Vegetable Research Farm, PAU, Ludhiana during summer 1995 under replicated trial. Each replication accommodated five plants. Spacing between rows and plants was maintained at 3 m x 50 cm respectively. Two rows were planted per bed. Data were recorded for only 44 genotypes as 8 lines did not germinate. Quantitative characters studied include cotyledon size (L x B, cm 2), fruit number per plant, fruit shape (E/P), vine length (m) and yield (kg/plant). Based upon the performance in the first year, 18 lines were planted during 1996 for re-evaluation.

Results and Discussion. Number of fruits/ vine ranged from 4 for TGR 898 to 138 for PI 386034 (Table 1). Other prolific fruit bearing lines were PI 386032 (1000), PI 396055 (80), TGR 1253 (78), PI 386052 (75), PI 386085 (75), PI 282442 (65), PI 147065 (65) and Clark No. 156 (63). the highest fruit yield/plant was recorded in PI 282442 (2kg), followed by PI 386052 (1.8kg), PI 386085 (1.4kg), PI 386055 (1.4kg), PI 196477 (1.375kg), and PI 438679 and PI 386034 (1.3kg each). Vine length varied from 1.07 m in PI 386076 to 3.58 m in PI 386052. Other genotypes having vine length greater than 3 m include TGR 539 (3.18m), TGR 1928 (3.13m), PI 386071 (3.10m) and PI 282442 (3m). Fruit shape ratio varied from 2.2 for PI 233646 to 1.1 for TGR 1253.

Correlation coefficients were estimated between yield/plant and fruit number/plant, vine length, cotyledon size and fruit shape. Estimation of correlation (Table1) indicated that yield might be improved by selecting for fruit number and vine length. Fruit shape and cotyledon size had no correlation with yield cannot be used as a selection criterion for improving gherkin yields.

Eighteen lines producing average yield of 0.80 kg/plant or more during 1995 were replanted during 1996. Among these lines, PI 438679, PI 196477, PI 147065 and PI 320052 had yields in 1996 that were similar to the 1995 yields (Table 2). The fruit of these four PIs are egg-shaped, non-bitter and with the exception of PI 147065 have smooth surfaces. PI 438679, PI 196477, PI 147065 and PI 320052 are all commercially acceptable.

Table 1. Evaluation of gherkin germplasm during 1995.

SR No.
Line
Fruit No./Plant
Vine Length (m)
Cotyledon Size (cm2 )
Fruit Shape (E/P)
Yield/Plant (kg)
1
PI-233646
50
1.1660
0.640
2.200
1.100
2
PI-386082
22
2.580
1.440
1.300
0.591
3
PI-482-385
29
1.950
1.200
1.600
0.357
4
PI-386023
100
2.000
0.560
1.400
0.500
5
PI-386075
32
1.750
0.310
1.300
0.450
6
PI-386034
138
2.500

0.830

1.600
1.300
7
PI-386029
58
2.000
0.630
1.700
0.967
8
PI-438679
52
2.400
1.280
1.700
1.375
9
PI-320052
38
2.500
0.580
1.500
0.205
10
PI-196477
62
2.700
0.850
1.800
0.300
11
PI-386044
19
2.500
0.750
1.700
0.629
12
PI-438570
28
2.200
1.250
1.800
0.350
13
Clark No. 156
63
2.000
1.740
1.200
0.300
14
PI-386062
22
2.730
0.970
1.700
0.733
15
PI-386080
35
1.750
0.740
1.600
1.050
16
Gatooma 29
11
2.790
0.530
1.600
0.460
17
Gatooma 26
51
2.760
0.900
2.000
0.700
18
TGR-1928
19
3.130
1.640
2.000
0.483
19
TGR-80
30
3.570
1.090
2.000
0.150
20
TGR-539
17
3.180
0.910
1.500
1.800
21
TGR-289
8
2.000
1.370
1.500
1.100
22
TGR-235
40
2.600
1.470
1.900
0.210
23
TGR-1253
78
3.550
0.830
1.100
0.080
24
TGR-898
4
2.120
1.470
1.700
1.100
25
PI-442176
15
2.140
0.750
1.700
0.150
26
PI-147065
65
2.250
0.820
2.000
1.150
27
PI-386076
40
1.070
0.400
1.600
0.160
28
PI-386071
38
3.100
0.590
1.400
0.125
29
PI-386070
15
1.530
0.400
1.800
0.400
30
PI-386086
8
2.200
0.430
1.800
0.800
31
PI-386085
75
2.000
0.740
1.400
0.350
32
PI-386052
75
3.580
0.670
1.700

1.800

33
PI-386067
24
1.410
0.620
2.000
0.350
34
PI-386036
22
1.550
0.320
1.900
0.255
35
PI-386039
23
1.750
0.590
1.600
0.210
36
PI-386064
14
1.900
0.910
1.200

0.420

37
PI-386037
53
2.500
0.510
1.500
0.900
38
PI-386055
80
0.050

0.550

1.600
1.400
39
PI-386048
56

0.500

0.460
1.700
1.060
40
PI-386066
50
2.300
0.330
1.500
0.700
41
PI-386051
40
1.830
0.370
2.000
0.375
42
PI-386054
60
1.100
0.440
1.600
0.850
43
PI-282442
65
3.000
0.550
1.300
2.000
44
PI-482383
50
2.700
1.190
1.600
0.840
CD at P=0.05
3.45
0.640
0.090
0.130
0.210
Corr. with yield
0.69
0.470
-0.020
-0.130

Table 2. Yield and fruit characteristics of selected gherkin lines during 1996.

SR
Line
Fruit No/Plant
Yield/plant (kg)
Fruit surface
Fruit shape
Fruit taste
1
PI-438679
42.4
0.920
Smooth
Egg
Non-bitter
2
Pi-196477
60.7
1.360
Smootj
Egg
Non-bitter
3
PI-147065
60.2
1.400
Spined
Egg
Non-bitter
4
PI-320052
40.3
0.820
Smooth
Egg
Non-bitter
CD a P=0.05
5.17
0.250

Acknowledgment: I am grateful to North Central Regional Plant Introduction Station, Ames, Iowa USA, for providing seed material.

Literature Cited

  1. Whitaker, T.W. and G.N. Davis. 1962. Cucurbits: Botany, Cultivation and Utilization. Leonard Hill, London, 250 pp.
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Page citation: Wehner, T.C., Cucurbit Genetics Cooperative;
Created by T.C. Wehner and T. Ng, 1 June 2005; design by C.T. Glenn;
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