Author(s):

Sima Sinha, SB Mishra, Chandan Kishore and SS Pandey

Abstract: The present research work was carried out to study the correlation of yield and its component traits along-with their cause-effect relationship. Four genotypes of each mungbean and urdbean were used to produce six intra-specific and four inter-specific crosses viz. HUM 16 x LGG 450 (cross I), samrat x LGG 450 (cross II), TMB 37x LGG450 (cross III), Shekhar × Barabanki (cross IV), PU 31 × Barabanki (cross V) and Uttara × Barabanki (crossVI) and Samrat x Barabanki (cross I), TMB-37 x barabanki (cross II), PU 31 x LGG450 (cross III), Uttara x LGG450 (cross IV) respectively. The generated material (P₁, P₂, F₁, F₂, BC₁ and BC₂₎ of all the crosses were grown in randomized block design with three replications. The observations were recorded for thirteen quantitative and qualitative characters. The analysis of variance (ANOVA) showed significant value for all the traits under study, reflecting scope of selection for developing better seggregants in hybridization program. Phenotypic coefficient of variation (PCV) was greater than the coefficient of variation at genotypic level (GCV) but the difference was narrow. Hence, there was less role of environment on the expression of the selected traits. The magnitude of genotypic correlation was observed greater than the phenotypic correlation for all the traits. 100 seed weight, grains per pod, pod length and harvest index exhibited highly positive and significant correlation with Grain yield per plot. The study of direct effect with grain yield reveals that, 100-seed weight (0.470), grains per pod (0.188), pod length (0.035) and harvest index (0.418) showed the positive and highly significant direct effects on grain yield. In this experiment residual effect was very high, indicates that, very few of the yield contributing characters were taken under study which attribute towards the grain yield of vigna.

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