Variability, correlations, and path co-efficient analysis in snake gourd (Trichosanthes cucumirana L.) inbreds
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Abstract
Background and Objective: The present study was undertaken to determine the genetic variation, the correlation coefficient, the interrelationship between the different characters, and the direct and indirect contribution of these characters to the yield of snake gourd inbreds.
Methodology: Fifteen snake gourd inbreds were evaluated to measure the genetic variability, heritability, and path coefficient analysis for association among the characters and their contribution to yield.
Main Results: A significant variation was observed for all the characters among the inbreds. High genotypic coefficient of variation (GCV) along with high phenotypic coefficient of variation (PCV) was found for the characters like fruit length (103.80% and 104.42%), individual fruit weight (31.27% and 33.47%), and yield per plant (25.11% and 33.81%). Whereas high heritability, coupled with the high genetic advance in percent means, was observed for fruit length (98.82% and 73.41%), individual fruit weight (87.30% and 60.19%), and number of fruits per plant (86.56% and 47.79%) which indicates that these characters are controlled by additive gene effect with minimum environment effect. Hence, direct selection can be the way out for further improvement of snake gourd inbreds. The highest positive direct effects were recorded for individual fruit weight (0.69), number of fruits per plant (0.31), and harvest duration (0.62). Correlation studies revealed that fruit yield had a significant positive correlation with individual fruit weight, number of fruits per plant, and harvest duration.
Conclusions: So, the direct selection of high-yielding inbreds of snake gourd should emphasize the individual fruit weight and number of fruits per plant.
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