Genetic variability, correlation and path coefficient analysis for yield and its attributing traits in cotton [Gossypium hirsutum L.)

摘要

In the present investigation, the genetic parameters viz., genotypic and phenotypic variability, genotypic and phenotypic coefficient of variation, heritability, genetic advance and path coefficient were studied for seed cotton yield and its componenttraits in 15 diverse genotypes of cotton (Gossypium hirsutum L.). The analysis of variance revealed significant differences among the genotypes for all the characters studied. The high genotypic and phenotypic coefficient of variation observed for lint(kg/ha), seed cotton yield and monopodia/plant. High heritability coupled with high genetic advance as per cent of mean were exhibited by lint kg/ha, monopodia/plant and seed cotton yield. However, bolls/plant, GOT (%) and seed index recorded high heritability with moderate genetic advance. The characters plant stand, fibre length and plant height had low genetic advance as per cent of mean values and had moderate heritability indicating lesser proportion of genetic components in the total variability.Seed cotton yield was found positive and significantly correlated with monopodia, sympodia/plant, GOT (%), lint kg/ha and fibre length. Lint kg/ha exhibited the highest magnitude of direct effects on seed cotton yield, followed by fibre length, plant height, bolls and sympodia/plant.