Character Association in Dolichos Bean [Lablab purpureus (L.) Sweet] in Agro-climatic Zone of North Bihar

Abstract

Background: The analysis of variance (ANOVA) for all characters of dolichos bean genotypes was carried out separately. The analysis of variance, test of significance of variance components were conductedin accordance to the procedure as suggested by Panse and Sukhatme (1967). Correlation and path coefficient analysis were evaluated as per the formulation of Al-Jibouri et al. (1958) and Dewey and Lu (1959), respectively. Methods: Present investigation was conducted in two locations viz. Vegetable Research Farm, Pusa and Birauli, Dr. Rajendra Prasad Central Agricultural University, Bihar during Rabi season in 2019-2020 and pooled data was analyzed. The entire experiment was conducted using fourteen genotypes of dolichos bean in RBD in three replications and fourteen yield attributing and morphological traits were studied. The performance of genotypes was evaluated on the basis of all fourteen characters. Best performing genotypes were screened based on their performance. Selection has been done for all characters which are positively and directly correlated with yield. Result: Among the fourteen genotypes it has been inferred that RAUDB-2 and RAUDB-7 had maximum pod yield. Therefore, they can replace the check variety Swarna Utkrist. The magnitude of genotypic correlation was higher than phenotypic correlation for all the traits indicating inherent associations between various characters. The traits such as pod diameter, number of pods per plant and harvest duration positively correlated with pod yield.In present investigation the path analysis revealed pod length, days to 1st flowering, days to 50% flowering and number of seeds per pod exerted positive direct effect on pod yield.