Trait Association and Magnitude of Direct and Indirect Effects on Fibre Yield in Tossa Jute (Corchorus olitorius L.) Genotypes

Abstract

The present investigation was carried out with 52 accessions of tossa jute genotypes along with 2 checks to estimate the association among different trait and effects on fibre yield per plot. Results of correlation analysis pointed out highly significant and positive association at both phenotypic and genotypic levels of plant height (rp= 0.461** & rg= 0.497**), basal diameter (rp=0.357** & rg=0.315**), mid stem diameter (rp=0.288** & rg=0.231**), plant population per plot (rp=0.691** & rg=0.696**), green biomass per plant (rp=0.691** & rg=0.711**), stick length (rp=0.482** & rg=0.506**), fibre percent (rp=0.306** & rg=0.668**), fibre weight per plant (rp=0.729** &rg=0.735**) with fibre yield per plot. The magnitudes of genotypic correlation were found higher than the phenotypic correlation. Partitioning of yield and its component traits into direct and indirect contribution of the traits, Green biomass per plant (0.739) exhibited highest positive direct effects on fibre yield per plot at phenotypic level followed by the plant population per plot (0.628) and fibre percent (0.312). Hence, these parameters may be considered as selection indices in jute breeding programmes.