INTERGENOTYPIC VARIABILITY STUDY IN 58 ADVANCED LINES OF Brassica rapa

Abstract

An experiment was carried out with 55 genotypes of Brassica rapa along with three commercially cultivated varieties as check to study their intergenotypic variability, correlation and path co-efficient analysis In respect of 10 different morphological characters at the experimental farm of Sher-c-Bangla Agricultural University. Dhaka during November 2007 to March 2008. Significant variation was observed among all the genotypes for all the characters studied except thousand seed weight. High GCY value was observed for number of secondary branches per plant. High heritability values along with high genetic advance in percentage of mean were obtained for days to 50% flowering, number of secondary branches per plant, seeds per siliqua and siliqua length. Highly significant positive association of seed yield per plant was observed with number of primary branches per plant, number of secondary branches per plant, number of siliquae per plant. Path analysis showed that yield per plant had the highest direct effect on number "I' primary branches per plant, number of siliquae per plant, number of secondary branches per plant and number of seeds per siliqua. Thus, these components were found as the important yield contributing traits and some lines were selected for future hybridization program to improve the yield status of the existing Brassica rapa genotypes.