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The present investigation was aimed to study the general combining ability of eight aromatic genotypes of rice and specific combining ability of all possible crosses for grain yield and quality traits in 28 F1’s obtained by 8x8 on way Diallel mating design. The estimates of SCA variance were revealed greater than GCA variance for all the characters except days to 50% flowering, days to maturity, plant height, effective tillers/plant and kernel length after cooking. It showed that both the additive as well as non-additive genetic variance exhibited importance for expression of the characters studied. The Parents, Pusa -2517-2-51-1and Pusa Sugandh-5 studied were identified as best general combiner for both yield and quality traits for most of the characters. Crosses, Pusa-2517-2-51-1×Type-3 showed non additive effects for yield traits only. However, the cross Ranbir Basmati x Pusa Basmati-1 showed non additive effects for quality traits. Cross combination viz., Pusa Sugandh-5 x Pusa Basmati-1, Ranbir Basmati x Kasturi Basmati, Kasturi Basmati × Pusa-2517-2-51-1 and Pusa Sugandh-3 x Type-3 showed non additive gene action for most of the yield as well as quality traits. For those traits which showed high performance were under the control of dominance and dominance × dominance gene effects, heterosis breeding would be most effective. Thus, present study aims to develop hybrids performing better for both yield as well as quality traits.

Combining ability studies for yield and quality traits in aromatic genotypes of rice (Oryza Sativa. L.)