MORPHOLOGICAL CHARACTERIZATION OF CUCUMBER GENOTYPES FOR IMPROVEMENT OF LOCAL CULTIVAR (Cucumis sativus L.)
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Date
2018-11-05
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
Cucumber (Cucucmis sativus L.) is one of the most important cucurbitaceous
vegetable crop grown extensively in tropical and sub-tropical parts of the country.
The investigation was carried out in the field of Department of Vegetable Science,
Kittur Rani Channamma College of Horticulture, Arabhavi, Gokak (Karnataka)
during kharif and rabi seasons of 2017-18. Experiment involving thirty genotypes
collected from various sources was evaluated in RCBD design with two replications.
The analysis of variance revealed highly significant difference among the
genotypes for all the characters studied indicating the higher magnitude of variability
in the germplasm in kharif, rabi and also in pooled average of both the seasons.
The estimates of PCV were higher than the GCV for all the characters studied,
indicating that variation is not only due to genetic but also influenced by
environmental factors. High heritability coupled with high genetic advance was
observed for vine length, leaf area, intermodal length, number of fruits vine-1, number
of male and female flowers vine-1, sex ratio, fruit setting per cent, number of fruits
vine-1, average fruit weight, fruit length, fruit yield vine-1, fruit yield plot-1, fruit yield
hectare-1, flesh thickness and vitamin- C content at both the seasons, Which reveals
that variation in these characters is mainly due to the action of additive genes and
these traits can be improved by direct selection.
Correlation and path analysis studies revealed that fruit yield vine-1 had
significant positive association with average fruit weight, vine length, leaf area, fruit
length, circumference of fruit, number of fruits vine-1 and number of female flowers
vine-1. Maximum positive direct effect on fruit yield vine-1 was exhibited through
average fruit weight, number of fruits vine-1 and leaf area. Hence direct selection for
these traits would be more useful in the improvement of yield.
Using Mahalonobi’s D2 analysis, 30 genotypes were grouped into 8, 7 and 10
clusters during kharif, rabi and pooled average over both seasons respectively. The
intra cluster distance was found maximum in cluster-V in kharif and rabi and cluster-
II in pooled average of seasons. The lines identified for higher fruit yield viz. HUB-
10, Long White, Long Green, IIHR-266, IIHR-303 and HUB-1 were identified on the
basis of their per se performance can be used for further evaluation and also as base
material for hybridization programme.
Description
TH-660
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