VARIABILITY STUDIES IN RIDGE GOURD [Luffa acutangula (L.) Roxb.]

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Date
2015-01
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The investigation on ‘variability studies in ridge gourd [Luffa acutangula (L.) Roxb.] was undertaken during the year 2013-2014 at Department of Vegetable Science, Kittur Rani Channamma College of Horticulture, Arabhavi, Karnataka. Totally forty four ridge gourd genotypes were evaluated and significant differences were observed among genotypes for all the characters studied. For all the characters studied phenotypic co-efficient of variation (PCV) was higher than the genotypic co-efficient of variation (GCV). High PCV and GCV were observed for the characters viz., number of leaves at 90 days after sowing (DAS), sex ratio, average fruit weight, fruit yield per plant, fruit yield per plot, fruit yield per hectare and seed yield per fruit. This indicated maximum variability and offers good scope for crop improvement by simple selection. High heritability coupled with high genetic advance over per cent of mean was observed for the characters viz., number of leaves at 90 DAS, sex ratio, average fruit weight, fruit yield per plant, fruit yield per plot and fruit yield per hectare and it indicates that these characters were governed by additive gene action and offers good scope for improvement by simple selection. Character association studies revealed that the fruit yield per plant had highly significant and positive association with vine length at 90 DAS, number of leaves at 90 DAS, number of fruits per plant, average fruit weight, fruit yield per plot, seed yield per fruit and number of seeds per fruit. Since, these associations are in the desirable direction, selection for these traits will improve the yield per plant. Path co-efficient analysis revealed that fruit yield per plot had high direct positive effect on fruit yield indicating their true positive and significant association with yield. By following Mahalanobis D2 analysis 44 genotypes were grouped in to seven clusters. The cluster V showed maximum intra- cluster distance and the maximum inter-cluster distance was observed between cluster I and VI. The genotypes Arka Sujat, Arka Summet, DWD-2 and DMRG-3 were most promising.
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TH516
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