STUDIES ON GENETIC VARIABILITY IN SPONGE GOURD [Luffa cylindrica (L.) Roem.]
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Date
2020-10-08
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Banda University of Agriculture & Technology, Banda Uttar Pradesh
Abstract
Present investigation entitled "Studies on genetic variability in sponge gourd (Lufja cylindrica (L.) Roem.)" was undertaken at the Vegetable Research Farm, Department of Vegetable Science of Banda University of Agriculture and Technology, Banda during spring summer and rainy seasons, 2019. The experimental material comprised of 16 sponge gourd genotypes. Crops were raised in randomized block design with three replications. Data were recorded in each plot for 19 plant growth and fruit traits viz., days to 50% germination, days to first male flower emergence (days after sowing), days to first female flower emergence (days after sowing), node number of first male flower, node number of first female flower, intermodal length (cm), number of leaves per plant, leaf area cm2), number of branches, male/female ratio, days to first picking (days after sowing), fruit length (cm), fruit diameter (cm), specific gravity of fruits (g/cm"), total soluble solids (%), dry matter content (%), fruit weight (g), number of fruits per plant and fruit yield per plant (kg). On the basis of results over the two seasons, it was indicated that Kashi Divya, BUAT SG181, Pusa Sneha, CHSG-2 and Pant Tori-1 were promising genotypes with higher values for more than one desirable characters. High GCV & PCV, heritability and genetic advance as percentage of mean was estimated for number of branches, fruit diameter, number of fruits per plant and fruit yield per plant across the spring summer and rainy seasons. Correlation studies revealed that fruit yield per plant was positively and significantly correlated with number of fruits per plant, fruit weight, fruit length and number branches at genotypic and phenotypic levels over spring summer and rainy seasons. Path coefficient analysis indicated that number of fruits per plant had consistent positive and direct effect on fruit yield per plant at genotypic and phenotypic levels whereas, specific gravity of fruits and node number of first female flower exhibited high positive and direct effect at phenotypic level only across the seasons. Fruit weight showed consistent positive and direct effect on fruit yield per plant at genotypic level. Therefore, number of fruits per plant, node number of first female flower, fruit weight, male/female ratio and specific gravity of fruits should be considered in selection criteria for improving fruit yield per plant. On the basis of high inter cluster distance and cluster mean values, Kashi Divya x CHSG-1, Kashi Divya x KSG-14, Kashi Divya x BUAT SG-1, Kashi Divya x Pusa Sneha, BUAT SG18-2 x CHSG-1, BUAT SG18-2 x PSG-9 & BUAT SG18-2 x Kashi Shreya have been found as most divergent genotype combinations with high cluster means for most of desirable traits in sponge gourd.
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Yadav Vishal 2020. STUDIES ON GENETIC VARIABILITY IN SPONGE GOURD [Luffa cylindrica (L.) Roem.]. M.Sc. Thesis. 98p.