Genetic variability, character association and path analysis for seed yield and component traits under two environments in Indian mustard

Abstract

Total 50 genotypes of Indian mustard [Brassica juncea (L.) Czern & Coss.] collected from different parts
of country to study the revealed substantial genetic variability in the material under timely sown (E1) and late
sown (E2) environments. Genotypic and phenotypic coefficients of variance were higher for number of
secondary branches/ plant and seed yield/ plant under both the environments. High heritability in both the
environments was observed for days to 1st flowering, siliquae length and seed yield/ plant. Genetic advance
values were high for plant height, number of siliqua on main shoot and seed yield / plant under both the
environments, whereas, genetic advance as % of mean was high for seed yield / plant, 1000- seed weight,
number of secondary branches / plant and siliqua length. Seed yield / plant showed a positive significant
correlation with main shoot length, siliqua length, number of seeds / siliqua and 1000- seed weight in E1,
whereas in E2 it was positively associated with plant height, main shoot length, number of siliqua on main
shoot and 1000- seed weight. Days to 50% flowering showed maximum positive direct and indirect effect on
seed yield under both the environments.