GENETIC VARIABILITY, CORRELATION AND PATH COEFFICIENT ANALYSIS IN BC1F3 GENERATION OF Brassica napus L.

Abstract

A field experiment was conducted with 31 8C1F3 genotypes of Brassica tzapzis i. at the experimental field of Sher-.e-Bangla Agricultural University, Dhaka to study the genetic diversity, variability, correlation and path coefficient analysis during November 2012 to March 2013. The genotypes were found significantly variable for all the characters. Comparatively phcnotypic variances were higher than the genotypic variances for all the characters studied. The high CCV value was observed for number of secondary branches per plant. Plant height, number primary branches per plant, days to 50% flowering, and seed yield per plant showed high broad base heritability. The significant positive correlation with seed yield per plant was found in plant height, the number primary branches per plant, number of secondary branches per plant and number of siliqua per plant. Path coefficient analysis revealed that number primary branches per plant, number of secondary branches per plant and number of siliqua per plant had the positive direct effect on yield per plant. The genotypes were grouped into five clusters. The highest inter cluster distance was observed between cluster I and V and the maximum intra cluster distance was found in cluster IV. Considering group distance and other agronomic performance genotypes Cl. 62, 03, 020, and 028 might be suggested for future hybridization program.