Heritability, Genetic Advance, Correlation and Path Coefficient Analysis in Advanced Generation of Brassica napus L.

Abstract

Broad sense heritability and selection response were measured among forty rapeseed (Brassica. napus L. genotypes for seed yield and yield related traits.  The experiment was designed in Randomized Complete Block with three replications. High heritability with moderate genetic advance was observed for days to 1^st flowering, days to 50% flowering, days to 80% flowering and Days to maturity indicating medium possibility of selecting genotypes. The significant positive correlation with seed yield per plant were found in Days to 1^st flowering (G = 0.383, P = 0250), Days to 80% flowering (G = 0.738, P = 0.091), Days to maturity (G= 0.102, P= 0.033), Number of primary branches per plant (G = 0.816, P = 0.597), Number of secondary branch (G = 606, P = 433) and Siliqua per plant (G = 0.885, P = 0.626).  In addition, there were non-significant positive correlation with seed yield per plant was also found in Plant height (G = 0.082, P = 0.139), Number of seeds per siliqua (G = -0.314, P 0.069) and Thousand seed weight (G=0.237, P=0.162). The path coefficient studies indicated that plant height, number of primary branches per plant, number of secondary branches per plant and number of siliqua per plant were the most important contributors to seed yield per plant which could be taken in consideration for future hybridization program.

Keywords: Heritability, Genetic Advance, Correlation Coefficient, Path Coefficient Analysis, Brassica rapa L.

DOI: 10.7176/JBAH/13-2-03

Publication date: January 31^st 2023