Identification of restorers and maintainers among the locally adapted genotypes for hybrid development in rice (Oryza sativa L.)
Two cytoplasmic genic male sterile lines of rice viz., CO MS 24A and TNAU CMS 2A having wild abortive source were crossed with 20 testers to identify their restorer/maintainer nature. Total of 40 hybrids were subjected to pollen and spikelet fertility analysis along with their parents. Six effective restorers and eight maintainers were identified among the 20 genotypes. TKM 9 was found to be a common maintainer for CGMS lines TNAU CMS 2A and COMS 24A and the genotype ADT 37 was identified as restorer for both the CGMS lines COMS 24A and TNAU CMS 2A. The identified restorers and maintainers could be utilized for development of new rice hybrids and CMS lines in future.
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