Transgressive Segregation Analysis in F3 Generation in MUNG BEAN [Vigna radiata (L.) Wilczek]

Abstract

The present investigation was conducted to evaluate twelve crosses of mungbean genotypes for eleven characters to access the magnitude of genetic variability and to understand the heritable component of variation for grain yield and its component traits. All the 12 crosses were grown in compact family block design with three replications in each of two environments during kharif, 2022. The analysis of variance revealed significant differences among the families for grain yield and all other traits in both the environments. On the other hand, differences among the progenies within a family varied from character to character and environment (E1) to environment (E2). In each of the crosses under study, the seed yield per plant was transgressed simultaneously with one or several other characters. Interestingly, some important and rare transgressive segregants, though low in frequency, were picked up in different crosses. In addition, there were several such combinations of characters in which seed yield per plant was transgressed in conjugation with transgression with other agronomic characters. The details of these rare and critical transgressive segregants are presented in Table 4. In E1 the promising transgressive segregants identified were C2P5-7, C2P5-13, C1P4-2, C11P5-6, C11P5-10, C7P4-12, C7P4-13, C3P2-2, C3P2-3, C3P2-5. In E2 the promising transgressive segregants identified were C1P4-10, C1P1-6, C1P5-6, C1P5-10, C12P5-5, C12P1-14, C7P5-7, C11P5-6, C11P5-7, C11P5-10, C10P5-12. The majority of the individuals, whenever increasing parent seed yield per plant was transgressed; there was simultaneous transgression for one or more other yield contributing characters like clusters per plant, pods per cluster, pods per plant, pod length and primary branches per plant, plant height.