PJB-2002-25
GENETIC VARIABILITY, CORRELATION AND PATH ANALYSIS OF YIELD AND ITS COMPONENTS IN WINTER RAPESEED (BRASSICA NAPUS L.)
NAAZAR ALI, FARZAD JAVIDFAR AND AHMAD ALI ATTARY
Abstract
Twenty-five winter type rapeseed genotypes selected from diverse germplasm were studied to estimate heritable variation, correlation among yield and yield components and effective selection criteria to improve yield. The genotypes differed significantly for all the traits studied. Genotypic and phenotypic variances were high for pods per plant and plant height, whereas the highest genotypic and phenotypic coefficients of variability were found for seed yield and pods per plant, respectively. Broad sense heritability ranged from 0,146 (seeds per pod) to 0.488 (seed yield). Moderate heritability of seed yield and seed weight coupled with high genetic advance indicated that improvement could be done through mass selection for these traits. Seed yield was positively correlated with all the yield components. Plant height has also shown positive correlation with branches per plant, pods per plant and seeds per pod. Path coefficient analysis indicated that pods per plant, seeds per pod and seed weight have considerable direct positive effect on seed yield. Pods per plant has also shown positive indirect effect for all the yield components.
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