STUDY ON YIELD ATTRIBUTING TRAITS AND PROFITABILITY IN PUMPKIN (Cucurbita moschata Duch. ex Poir.) CULTIVARS UNDER COASTAL A.P CONDITIONS
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Date
2017-08-18
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COLLEGE OF HORTICULTURE, VENKATARAMANNAGUDEM WEST GODAVARI – 534 101 Dr. Y. S. R. HORTICULTURAL UNIVERSITY
Abstract
The present investigation entitled “Study on yield attributing traits and profitability in pumpkin (Cucurbita moschata Duch. ex Poir.) cultivars under coastal A.P conditions” was carried out at Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari district of Andhra Pradesh during Kharif, 2016-2017. The experiment was laid out in a randomized block design with 14 treatments replicated twice. Data recorded on various parameters viz., days to 50% germination, vine length (cm) at 30, 60 DAS and at maturity, number of primary branches per vine at 30, 60 DAS and at maturity, number of leaves at 30, 60 DAS and at maturity, days to first male flower appearance, node number of first male flower appearance, days to first female flower appearance, node number of first female flower appearance, days to fruit harvest, average fruit weight (kg), fruit length (cm), fruit diameter (cm), flesh thickness (cm), placenta weight per fruit (g),TSS (o), 100-seed weight (g), number of fruits per vine, yield per vine (kg) and yield per hectare (t ha -1) were subjected to the analysis of genetic variability, heritability, character association and path coefficient studies.
The analysis of variance revealed significant differences for the characters under study suggesting considerable amount of variability existing among the genotypes. The phenotypic coefficient of variation was slightly higher in magnitude than genotypic coefficient of variation for some of the characters indicating that such characters had interacted with environment to some degree. High PCV and GCV were recorded for placenta weight per fruit and flesh thickness suggesting the existence of wider genetic variability for these traits in the genotypes under study. High heritability coupled with high genetic advance as per cent of mean was observed in case of placenta weight, vine length, number of fruits per vine, average fruit weight, fruit diameter,
100-seed weight, flesh thickness, TSS, yield per vine, and yield per hectare indicating the preponderance of additive gene action, making selection based on these characters to be more effective. Days to 50% germination, number of primary branches per vine, node number of first male flower appearance, days to first female flower appearance, and days to first fruit harvest showed high or medium heritability and moderate genetic advance as per cent of mean suggesting the presence of both additive and non additive gene action involved in the inheritance of these traits.
The correlation analysis indicated that number of primary branches per vine, number of fruits per vine, fruit length, fruit weight and vine length had significant positive association with fruit yield per vine at genotypic level, and significant negative correlation with node number of first female flower appearance, days to first male flower appearance, days to first female flower appearance and days to first fruit harvest at genotypic level. Path coefficient analysis showed that very high positive direct effect on yield per vine was exerted by node number of first male flower appearance, days to first male flower appearance and fruit length whereas, a very high negative direct effect was exerted through days to first fruit harvest, flesh thickness and placenta weight per fruit. It clearly indicated that direct selection based on these characters would be effective for an increase in yield. The economic study revealed that cultivar Narendra Amrit was found to be highly profitable due to maximum net returns and benefit cost ratio realized.
The present investigation revealed that the genotypes Narendra Amrit, Punjab Samrat and Kashi Harit were found to be superior in respect of vine length, crop duration, fruit weight, yield per vine and high benefit cost ratio. Those superior cultivars if used in crop improvement programmes can produce desirable segregates.
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The present investigation revealed that the genotypes Narendra Amrit, Punjab Samrat and Kashi Harit were found to be superior in respect of vine length, crop duration, fruit weight, yield per vine and high benefit cost ratio. Those superior cultivars if used in crop improvement programmes can produce desirable segregates.
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Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari district of Andhra Pradesh