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

P. Saidaiah, S. Sudheer Kumar and M.S. Ramesha

Journal of Agricultural Science, 2010, vol. 2, issue 2, 225

Abstract: Combining ability study on grain yield and its components from line x tester analysis over the locations of fivewell adapted CMS lines and twenty three testers of different eco-geographic origin revealed higher SCA variancethan 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 foryield and its majority of the traits. IBL-57 was the only good general combiner among the male parents forearliness, dwarfness and grain yield per plant. The hybrids APMS 6A x SC5 9-3, APMS 6A x 1005 and APMS6A x GQ 25 were identified as potential one for yield and desired traits based on sca effects.

Date: 2010
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