Author(s):

Rajawat KS and Collis JP

Abstract: An experiment was conducted to study Genetic variability, heritability and genetic advance for some traits in Cucumber (Cucumis sativus L.). Twelve genotypes were used in this experiment. These genotypes were planted in Randomized Block Design with three replications during the rainy season of the year, 2014 at vegetable research farm, Department of Horticulture, Allahabad School of Agriculture, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad (U.P.). Genetic Variability, heritability, genetic advance and genetic gain for different characters were studied in 12 genotypes of cucumber. The study indicated existence of considerable amount of genetic variability for all the traits in all the genotypes used in the experiment. The maximum phenotypic and genotypic coefficient (PCV and GCV) was observed for number of female flowers per vine (19.28 and 21.54), number of male flowers per vine (19.62 and 20.79), fruit yield per vine (19.86 and 19.88), number of branches per vine (13.79 and 16.29), number of fruits per vine (14.20 and 15.51), node number at which first appears of male flowers (10.11 and 15.22), node number at which first appears of female flowers (12.78 and 15.14) and fruit length (11.66 and 11.92). High genetic advance over mean coupled with high heritability was observed in characters like number of male flowers per vine, vine length and fruit weight (g). However, the estimates were moderate for number of female flower’s per vine. Higher heritability estimates were accompanied by lower genetic advance over the mean for vitamin C, TSS, fruit yield per vine and days to first fruit harvest. The maximum genetic gain in per cent was recorded for fruit yield per vine (kg), number of male flowers per vine, number of female flowers per vine, number of fruit per vine, number of branches per vine, fruit length and node number at which first appears of female flower.

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