Genetic variability, trait association and path coefficient analysis for yield and yield attributing traits in sesame (Sesamum Indicum L.)

Abstract

Genetic variability, heritability, genetic advance, association and path analysis studies were carried out in fourth five sesame genotypes for twelve yield and its contributing traits. The analysis of variance revealed significant differences among the genotypes for each character indicating the presence of sufficient variability in the experimental material. Higher magnitude of both Phenotypic and genotypic correlation coefficients were recorded for branches per plant, capsules per plant and seed yield per plant. High heritability coupled with high genetic advance as percent of mean was observed for branches per plant, capsule length and seed yield per plant which indicated that these traits are governed by additive gene action. The characters plant height, branches per plant, capsules per plant, seeds per capsule, test weight, harvest index and oil content showed significant and positive association with seed yield per plant. Therefore, simultaneous improvement of seed yield may be possible through selection of these characters. Path coefficient analysis at genotypic level indicated that plant height, branches per plant, capsules per plant, seeds per capsule, harvest index, test weight and oil content had positive direct effects and significant positive correlation with seed yield per plant.