Genetic variability and inter-relation of seed yield with contributing traits in Indian mustard (Brassica juncea)

Abstract

The experiments were conducted involving thirty nine genotypes of Indian mustard including 28 F1 crosses
and 11 parental genotypes during Rabi 2014-15 to 2015-16 at ICAR-Directorate of Rapeseed-Mustard
Research, Bharatpur, India. Analysis of variance on 12 quantitative characters was carried out which revealed
considerable amount of genetic variability in genotypes for all the traits. The mean, range, genotypic coefficient
of variation (GCV), phenotypic coefficient of variation (PCV), heritability in broad sense and genetic advance
were calculated. High genetic advance (GA %) coupled with high heritability for seed yield, 1000-seed
weight, siliqua length, plant height and number of primary branches/ plant indicated the effectiveness of
selection for these traits. 1000-seed weight, siliqua length, plant height, main shoot length and days to maturity
were positively associated with seed yield; hence the selection for these traits would help in improving the
seed yield. The crosses NRCHB 101 x NPJ 112, (NPJ 112 x RRN 727) x RH 406 and NPJ 112 x RRN 727
revealed high mean performance for seed yield can be advanced for yield improvement and selection of
superior genotypes.