Abstract
Five cytoplasmic male sterile (CMS) lines with Wild Abortive (WA) CMS source and one CMS line having Oryza perennis cytoplasm were crossed with 20 rice genotypes to assess their restorer/maintainer behaviour. All the 20 F1s with IR 66707A line having O. perennis cytoplasm produced only sterile hybrids. Most of the genotypes expressed differential fertility reactions when crossed with CMS lines having WA cytoplasm. The genotypes, IR 10198-66-2R, IR 65515-47-21-19, TNAU 94241 and TNAU 841434 were identified as effective restorers while ADT 43, ASD 19, CB 97083 and CO (R) 47 produced completely sterile hybrids with CMS lines carrying WA cytoplasm. Ten best heterotic combinations were identified based on economic traits.
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