Identification and categorizationof restorers and maintainers for CMS lines of rice (Oryza sativa L.) focusing on hybrid development
Keywords:
Fertility, maintainers, restorers, riceAbstract
Cytoplasmic male sterility plays an important role in hybrid seed production. Three CMS lines (IR5805A, IR79156A and IR68897A) were crossed to 20 rice parental lines following line × tester mating design during kharif, 2022to identify potential restorers and maintainers followed by evaluation of F and their respective 1 parents during kharif, 2023 at Rice and Wheat Research Centre, Malan (Himachal Pradesh). The performance varied across CMS lines where in two genotype HPR2866 and Varundhan exhibited full restoration potential based on pollen and spikelet fertility for CMS line IR-5805A while genotypes HPU2216, HPR2143 and HPR2880 showed the same for CMS line IR79156A. There waslack of effective maintainers in the material though there were 17, 14 and 15 partial restorers for IR5805A, IR79156Aand IR68897A, respectively. Overall, CMS line IR68897A demonstrated the highest pollen fertility (92.13%), while IR79156A had the highest spikelet fertility (64.29%).
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