Evaluation of heritability, genetic advance, correlation and genetic components of variance in Pigeonpea

Abstract

The present study was conducted at the Evaluation of Heritability, Genetic advance, correlation and Genetic components of Variance in Pigeon pea. The experiment took two crop seasons viz. Kharif 2014-15 and Kharif 2015-16. During the kharif season of 2014-2015, 12 parental lines i.e. 7 lines and 5 testers were sown in a Randomized Block Design (R.B.D.) with three replications to obtain data on eleven different traits for yield and yield attributes. Simultaneously. The present experimental study revealed that secondary branches, number of pods/plant and primary branches showed high heritability along with high genetic advance as percent of mean manifesting that the selection for these traits are likely to accumulate more additive genes leading to further improvement of their performance, primary branches and plant height had a positive phenotypic correlation coefficient with each other. Also, secondary branches and primary branches had a positive association with each other. Significant and positive phenotypic correlation coefficient was observed between pods/plant and primary branches. Pod/plant exhibited positive and significant phenotypic correlation coefficient with secondary branches and the major role of non- additive component was evident for plant height, days to 50% flowering, primary branches, secondary branches, number of pods / plants, 100 seed weight and green pod yield / plant; as the magnitude estimated dominance (σ2D) component of variance was higher than that of the additive (σ2A) component of variance. For the character number of pods per cluster and number of seeds per pod, equal importance of additive and non- additive components was observed.