GENETIC VARIABILITY STUDIES IN EARLY GENERATION POPULATIONS DERIVED FROM COMMERCIAL HYBRIDS OF RIDGE GOURD (Luffa acutangula L.)
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Date
2018-07
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University of Horticultural Sciences, Bagalkot
Abstract
Investigation on “Genetic variability studies in early generation populations
derived from commercial hybrids of ridge gourd (Luffa acutangula L.) was conducted
in the field of Vegetable Science at College of Horticulture, Bagalkot. Two F2
populations derived from Naga and NS-3 hybrids were evaluated during summer
2018. Difference among two population variances was observed for all the characters
studied indicating the higher magnitude of variability in F2 populations.
High genotypic and phenotypic coefficient of variation were observed for
node to first female flowering, node to first male flowering and fruit yield per plant in
both the populations. The high heritability coupled with high genetic advance as per
cent over mean were observed for vine length at 60 days after planting, days to first
male flowering, days to first male flowering, node to first female flowering, average
fruit weight, TSS and vit-C in the F2 populations of both the hybrids. Additive
inheritance is predominant in these characters. Thus there is ample scope for
improvement of these characters through simple selection.
Significant positive correlation for fruit yield per plant with number of fr uits
per vine, average fruit weight, fruit length and fruit diameter were noticed. These
traits also had high positive direct association with fruit yield per plant. Hence, direct
selection of these traits would be more useful in the improvement of fruit yield per
plant.
Based on number of fruits and high fruit yield per plant the plant numbers 7,
9, 26, 29, 30, 31, 122, 123,137 and 187 in Naga F2 population, plant numbers 2, 4,
5,44 ,47 ,80 ,93 ,132 ,187 and 199 in NS-3 F2 populations were selected for further
improvement.