Combining Ability Analysis for Yield and Yield Contributing Traits Using Cytoplasmic Male Sterile Lines in Aromatic Hybrids of Rice

Combining ability was studied for 60 F 1 aromatic rice hybrids involving three CMS lines and 20 aromatic testers using line × tester analysis along with 23 parents for yield and yield contributing traits.Variance of SCA was higher than that of GCA for all the characters suggesting the significant role of non-additive gene action on the inheritance of these characters.The relative contribution of lines, testers and combination of line × tester for all characters were calculated.It was found that lines were more important and their contribution was high for most of the traits indicated highly influence by maternal effects.Among the lines CRMS31A and tester viz.Indrabhesh Dubraj, Nagri Dubraj, Barhasal and Tarunbhog was identified as good general combiner.SCA effects of all the crosses revealed a very wide range of variation for all the characters.Cross combination CRMS31A × Tarunbhog, IR58025A × Indrabhes Dubraj and CRMS31A × Barhasal showed high magnitude of SCA effects for multiple traits.It was identified as the most promising hybrid.