Conference Proceeding

Assessment of Inheritance Pattern in Bitter Gourd for Yield and Quality Traits

Mr. Anupam Adarsh

Selection based only on phenotype is not always effective as the trait is likely to segregate in the advanced generations. Fruit yield is correlated with several traits including days to anthesis to 1st pistillate flower, number of primary branch, fruit number, fruit weight per plant and average fruit weight. Therefore, understanding the genetic architecture of various traits is very useful in plant breeding programme for achieving effective results. Quantitative traits are characterized by continuous distribution and the inheritance of such traits is governed by several genes, which have small and cumulative effects. The choice of an appropriate breeding method for improvement of quantitative traits also depends largely on gene action. Therefore, Generation mean analysis is a simple but useful technique for estimating gene effects for a polygenic trait, its greatest merit lying in the ability to estimate epistatic gene effects such as additive x additive (i), dominance x dominance (h) and additive x dominance (j) effects. The inheritance of yield and its related traits in bitter gourd by using generation means analysis involving six generations in cross (Konkan Tara x Pusa Rasdar) revealed the presence of non-allelic interaction effects in expression of all the traits studied. All the traits were inherited by dominance (h) among the main effects and additive×additive (i) except fruit girth which was inherited by dominance (h) and dominance×dominance (l) type of interaction effect. Therefore, recurrent selection and diallel selective mating system in addition to heteros is breeding may be used to improve the traits in bitter gourd.

Published: 08 November 2017


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