Vol. 11, Issue 10 (2022)

Author(s):
Jaimin M Vadodariya, Balvant C Patel, Mukesh P Patel, Deep Kumar and Sunil K Patel

Abstract:
The experiment was carried out to obtain information on combining ability effects of parents and identifying best hybrids for improving seed cotton yield. The σ_gca^2/σ_sca^2 ratio indicated dominant role of non-additive gene action for all the studied characters except days to 50% flowering, ginning outturn, fiber fineness, uniformity index, seed index and lint index. Based on general combining ability effects, five parents viz., AHC-1, ABC-1, GSB-45, DB-1502 and RHcb-1014 were found good general combiners for seed cotton yield and its component traits suggesting the exploitation of heterosis breeding for development of hybrids. The sca effects revealed that none of the hybrids was consistently and significantly superior for all the traits. Out of all, only nine hybrids depicted significantly positive sca effects for seed cotton yield per plant. Based on sca effects, three superior cross combinations for seed cotton yield per plant were AHC-26 × ARBB-27, AHC-50 × GSB-44 and AHC-1 × GSB-43-1 and these crosses further evaluated for development of new hybrids.