Variability studies in Intra specific crosses of Indian mustard [Brassica juncea (L.) Czern and Coss.] genotypes

Abstract

The genetic variability in intra specific crosses of Indian mustard Brassica juncea (L.) Czern and Coss. genotypes were evaluated during rabi 2009-10 to study the genetic variability, heritability and genetic advance as percentage of mean for nine quantitative characters viz. plant height (cm), number of siliquae per main branch, number of primary branches per plant, number of secondary branches per plant, length of siliquae (cm), number of seeds per siliqua and seed yield per plant (g), days to 50% flowering and days to maturity. Analysis of variance showed significant differences among the crosses for all characters under study except for length of siliqua. Maximum genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was exhibited by number of secondary branches per plant followed by seed yield per plant and number of primary branches per plant. High estimates of heritability coupled with high genetic advance as per cent of mean was observed for number of secondary branches per plant followed by seed yield per plant and number of primary branches per plant.