Genetic variability, interrelation and path analysis for yield & yield characters in Indian mustard (Brassica juncea L.

Abstract

An investigation was undertaken to study the genetic variability, heritability, genetic advance and association of 13 characters Indian mustard (Brassica juncea L.) including number of biological yields, number of siliquae/plants, days to first flowering and days to 50% flowering. Analysis of variance estimates of all the characters were found highly significant. Coefficient of variation for genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were found high for the following traits i.e., primary branches per plant, 1000- seed weight, no. of seeds per siliqua and seed yield per plant. All the characters showing higher heritability except biological yield per plant, no. of siliquae/ plant show higher genetic advance. Highest value of GCV and PCV were recorded for 1000 seed weight (35.32 and 35.48) followed by biological yield (30.71 and 30.93), seed yield/plant (30.05 and 30.32), harvest index % (28.70 and 29.38). Correlation study revealed that that seed yield had significant and positive correlation with 1000 seed weight (0.71 G & 0.70 P), harvest index (0.48 G & 0.49 P), biological yield (0.53 G & 0.52 P), no. of siliquae per plant (0.46 G & 0.45 P) and number of primary branches (0.21G & 0.21P) at genotypic and phenotypic levels. These components play an important role in a crop for best selecting of genotypes for making rapid improvement in yield and other desirable characters as well as to select the potential parent for hybridization programmes.