Genetic evaluation of cucumber (Cucumis sativus L.) genotypes for yield and yield attributing traits
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Date
2016-06
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College of Horticulture, Bharsar Campus, V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
The present investigation entitled “Genetic evaluation of cucumber (Cucumis sativus L.) genotypes for yield and
yield attributing traits” was carried out at the Vegetable Production cum Demonstration Block, VCSGUUHF,
College of Horticulture, Bharsar (Uttarakhand) during the period, April to September 2015. Nineteen diverse
genotypes of cucumber (Cucumis sativus L.) were collected from different indigenous sources and planted in
Randomized Complete Block Design with three replications and were assessed to know the nature and magnitude
of variability, heritability, genetic gain and genetic divergence for yield and horticultural traits. The results
showed significant variation among different genotypes for all the traits under study. Genotype Bharsar LC-1 had
maximum total yield followed by Chinese Hytivus, K-75, Gherkin and Arunachal collection. Vine length,
number of branches, number of nodes, leaf area, inter-nodal length, average fruit weight and TSS was also
obtained maximum in Bharsar LC-1 followed by Arunachal collection.Genetic analysis indicated that phenotypic
coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) in all of the attributes
studied. High heritability (broad sense) estimates coupled with high genetic gain were observed for yield and
other horticultural traits. Linear correlation analysis showed that number of branches, vine length, leaf area, days
to first female flower, average fruit weight and TSS were significantly and positively associated with yield both
at genotypic and phenotypic level. Path coefficient analysis revealed that number of branches, pericarp thickness,
fruit per picking, fruit length, average fruit weight, node bearing first female flower, leaf area, maturity duration,
days to first female flower had positive direct effect on yield. Further, divergence studies indicated that
hybridization between genotypes from cluster II and III can be utilized for getting the superior recombinants in
segregating generations.
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