Combining Ability Analysis for Grain Quality Characters of Diverse CMS Lines in Hybrid Rice

Author: Nidhi Bhatt*, M.K. Nautiyal, Vikasmangal and Leela Bhatt

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Abstract

The general combining ability (GCA) of the parents and specific combining ability (SCA) of the crosses for twelve grain quality traits were determined using a line × tester mating design with three cytoplasmic male sterile (CMS) lines and eleven elite testers. Significant variations were reported in the lines as well as the testers for majority of characters. Allowing for the scope of heterosis breeding the combining ability analysis expressed the predominance of non-additive gene action for kernel length, kernel breadth, kernel length to breadth ratio, kernel length after cooking, kernel elongation ratio, hulling percentage, milling percentage, head rice recovery, gel consistency, alkali spreading value and amylose content; while additive gene action predominated in the character kernel breadth after cooking, which allows the scope for transgressive breeding. The GCA effect estimates revealed that among all the lines IR58025A and IR79156A were the best combiners for most of quality c

Keywords

CMS lines, general combining ability, specific combining ability; line × tester.

Conclusion

The study was aimed to determine the combining ability analysis of diverse CMS lines of hybrid rice. Forty-seven genotypes, comprising of three cytoplasmic male sterile (CMS) lines, eleven testers and thirty-three crosses were evaluated for grain quality characters. The evaluated parental genotypes and their hybrid combinations displayed significant variations indicating substantial genetic variability that could be exploited in hybrid rice breeding programme. Significant GCA and SCA effects were detected for the assessed traits among crosses and parents, which implies that both additive and non-additive effects influence these traits in the selected parents and crosses. For most quality characters, such as kernel breadth, kernel length after cooking, kernel breadth after cooking, kernel elongation ratio, hulling percentage, head rice recovery, milling percentage, alkali spreading value, and amylose content, the CMS lines IR58025A and IR79156A were identified as good combiners. Anjali

References

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How to cite this article

Bhatt, N.; Nautiyal, M. K., Vikasmangal and Bhatt, L. (2022). Combining Ability Analysis for Grain Quality characters of diverse CMS Lines in Hybrid Rice. Biological Forum – An International Journal, 14(1): 73-77.