ANALYSIS OF GENETIC VARIABILITY AND CHARACTER ASSOCIATION OF YIELD AND IT’S CONTRIBUTING CHARACTERS OF F7 POPULATION IN Brassica napus L.

Abstract

The experiment was conducted with the aim of assessment of the genetic variability,heritability,character association, path analysis of F 7 population of Brassica napus L. from November 2019 to February 2020.In this experiment, fortythree genotypes of Brassica napus L. were

evaluated based on randomized complete block design with three replications at the experimental field of Sher-e-Bangla Agricultural University, Dhaka.The genotypes were found significantly variable for all the eleven characters and From the values of mean. range and CV (%) of seed yield and yield contributing characters it was confirmed that there were considerable variation present among all the genotypes used in the experiment.The values of GCV and PCV indicated that there was least variation present among most of the characters.Comparatively, phenotypic variances were higher than the genotypic variances for all the characters studied. The high GCV and PCV value were observed for number of seed yield per plant (38.06 and 4.57 respectively). Seed yield per plant (99.47) exhibited the highest value of heritability followed by number of siliquae per plant (97.08). The significant positive correlation for seed yield per plant was found with days to maturity (0.186) and thousand seed weight (0.659). Path co-efficient analysis revealed that days to 50% flowering, number of primary branch, siliquae length, number of siliqua per plant, number of seed per siliquae and thousand seed weight had the positive direct effect on yield per plant.. Considering genetic analysis and other agronomic performance genotypes G6 (P1), G14 (P2), G18 (P2) and G9 (P3) might be suggested as promising high yielding lines with early maturity as fulfillment of farmer’s demand.