Abstract

The third-largest source of vegetable oil in the world now is mustard (Brassica spp.), one of the most significant oilseed crops. A study of Brassica napus L was conducted with 12 genotypes at Regional Agricultural Research Station (RARS), Barishal during rabi 2022-2023 to evaluate for yield and yield contributing characters. Three replications were used in the RCBD design for the experiment. The results of the analysis of variance showed that there were highly significant differences for the traits of plant height, number of primary branches, number of secondary branches, and number of seeds per siliqua. Three different clusters among the examined accessions were identified using the UPGMA cluster analysis. Cluster II obtained the most accessions (six), averaging 1776.14 kgha^-1, representing 33.67% of the average cluster mean yield. A correlation study focuses at the highly significant and positive correlation among a crop’s associated features and its yield. The overall amount of variance was found to be 53.72% for PC1 and 29.25% for PC2 using principal component analysis (PCA). Maturity duration ranged from 79-86 days while days to 50% flowering varied from 29-34 days. Seed yield ranged from 1477-1945 kgha^-1 and NAP- 21010 has produced the highest yield among the genotypes evaluated in this study. It produced 22.17% and 19.18% higher yield than check varieties BARI Sarisha-8 and BARI Sarisha-9, respectively. Based on, statistical analysis considering seed yield and other yield contributing characters, four lines NAP-20002, NAP-20008, NAP-18002, and NAP-21010 were noted as high yielding accessions and could be used for future breeding program.

Keywords: Brassica napus L; Yield; Cluster analysis; Breeding program; Traits correlation