Combining ability studies for development of new hybrids in rice over environments

P. Saidaiah, S. Sudheer kumar, M.S. Ramesha

Abstract


Combining ability study on grain yield and its components from line x tester analysis over the locations of five
well adapted CMS lines and twenty three testers of different eco-geographic origin revealed higher SCA variance
than GCA variance for all the traits indicating the prevalence of non-additive gene action. The lines APMS 6A,
PUSA 5A and CRMS 32A and testers 1096, 1005, IBL-57 and SC5 9-3 were the good general combiners for
yield and its majority of the traits. IBL-57 was the only good general combiner among the male parents for
earliness, dwarfness and grain yield per plant. The hybrids APMS 6A x SC5 9-3, APMS 6A x 1005 and APMS
6A x GQ 25 were identified as potential one for yield and desired traits based on sca effects.

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Journal of Agricultural Science ISSN 1916-9752 (Print) ISSN 1916-9760 (Online)

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