Studies on Genetic Variability and Morphological Variations of Greengram [Vigna radiata (L.) Wilczek] Germplasm

Abstract

Greengram [Vigna radiata (L.) Wilczek] belongs to the family of Leguminosae (Fabaceae) and it is an important annual legume crop widely cultivated in semi-arid tropics. In the present investigation, a total of 20 lines of greengram including one check variety were evaluated during Zaid, 2023 in Randomized Block Design with three replications for genetic variability, heritability, and genetic advance by using 13 quantitative traits and to study morphological variation for these 13 quantitative characters by metroglyph and index score method. Analysis of variance for various quantitative characters revealed that the mean sum of squares due to genotypes showed high significant differences for all characters under study at 1% level and 5% level of significance. High GCV, PCV, heritability, and genetic advance were recorded by number of pods per plant. Based on metroglyph analysis and scatter diagram, 20 genotypes were grouped into 5 complexes, and the maximum number of genotypes (15) were found in group I. The two most variable characters, number of pods per plant and plant height (cm) were selected for the X and Y axes, respectively. The germplasm lines VIRAT (31), CO-7 (31), LGG-407 (30), AMULYA (29) and IPM-2-3 (29) recorded high index scores and fell into different clusters do well for morphological variations for a greater number of traits. Thus, the use of these genotypes in future breeding programs for crossing to obtain maximum variability of good combinations is suggested.