Selection parameter analysis for F1 and F2 generations in yellow sarson (Brassica rapa L. var. yellow sarson)

Abstract

High heritability were observed for 1000-seed weight (89.39 g) and oil content (52.67%) in F1 generation and for harvest index (30.97%) in F2 generation. Among all the characters, the highest values were recorded for 1000-seed weight (89.39 g) and harvest index (30.97%) in F1 and F2 generations, respectively. High genetic advance were observed for leaf area index (76.45) and 1000-seed weight (36.60) in F1 generations and for leaf area index (67.64) and 1000-seed weight (51.59) in F2 generations. Among parents + F1s, seed yield per plant showed positive and significant association with leaf area index (cm/m2), number of secondary branches per plant, number of seeds per siliqua, harvest index (%), oil content (%) and protein content (%) at both phenotypic and genotypic level. Among parents + F2s, seed yield per plant showed positive and significant association with number of primary branches per plant, number of secondary branches per plant, number of siliquae per plant, number of seeds per siliqua, 1000-seed weight (g), harvest index (%), biological yield per plant (g), oil content (%) and protein content (%) at both phenotypic and genotypic level. Number of siliquae per plant (0.1611), followed by 1000-seed weight (0.1358), oil content (0.1324), number of seeds per siliqua (0.1191), number of secondary branches per plant (0.1182), plant height (0.0947) and Number of siliquae per plant (0.0613), followed by plant height (0.0714), number of secondary branches per plant (0.808), oil content (0.1806) and harvest index (0.2305) exerted very high and positive direct effect on seed yield per plant at both phenotypic and genotypic level among parents + F1s, respectively. Plant height (0.0016), followed by harvest index (0.0660), leaf area index (0.0726), 1000-seed weight (0.0759), number of siliquae per plant (0.0953), length of main raceme (o.1271), number of seeds per siliqua (0.1340), number of secondary branches per plant (0.1787) and protein content (0.2745) and Number of seeds per siliqua (2.1773), followed by length of main raceme (1.0040), protein content (0.1964), leaf area index (0.3026) and plant height (0.4316) exerted very high and positive direct effect on seed yield per plant at both phenotypic and genotypic level among parents + F2s, respectively.