Author(s):

Uma R Byadagi, Venkataravana P and Priyadarshini SK

Abstract: F₂ and F₃ populations of three crosses viz., TMV-2 × ICGV-91114, TMV-2 × TG-69 and TMV-2 × ICGV-00350 were assessed to estimate the nature and magnitude of genetic variability during kharif and summer-2017. Higher magnitudes of range and standardized range were observed for all the traits in all the three crosses. The higher estimates of GCV and PCV noticed for pods plant^-1, pod yield plant^-1, kernel yield plant^-1, branches plant^-1 and sound mature kernel percent which indicated the presence of adequate variability for these traits suggesting the ample opportunity for selection. The close correspondence between estimates of GCV and PCV indicated lesser influence of environment on traits like plant height, branches plant^-1 and days to first flowering in all the three crosses which is amply reflected by high broad sense heritability along with high expected GAM, suggesting the involvement of additive gene action in controlling these traits and hence, selection will be effective for these traits. A decreasing trend was observed for range, standardized range for both GCV and PCV from F₂ to F₃ generation, which explains the substantial decrease of variability in F₃ generation due to selection practiced in F₂ generation.

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