Assessment of genetic variability, correlation and path analysis in Indian mustard (Brassica juncea L)

Abstract

A study assessed the genetic variability, inter-relationship among yield components and their direct and indirect effect on 
seed yield in Indian mustard. Thirty-six genotypes of Indian mustard were evaluated in a randomized complete block 
design with three replications for 14 traits. A significant level of genetic variation, with minimal environmental impact, 
indicated consistent performance across genotypes. The analysis of variance showed that there were significant 
differences among all the traits across the treatments. The genotypic coefficient of variation, phenotypic coefficient of 
variation and heritability, and genetic advance were found to be higher for the harvest index, biological yield per plant, 
seed yield per plant, siliquae per plant and primary branches per plant. Genotypic correlation indicated that the siliquae 
per plant, protein content, primary branches per plant, biological yield per plant, secondary branches per plant, harvest 
index and oil content positively correlated with seed yield per plant. Path coefficient analysis revealed that harvest index, 
siliquae per plant, biological yield per plant, siliqua length and plant height positively affected seed yield. The genetic 
variability found in this set of breeding materials provides a basis for selection and offers valuable insights into selecting 
diverse parents for use in a hybridization program.