Indian Society of Genetics & Plant Breeding

Evaluation of rice genotypes for fertility restoration against WA and Oryza perennis cytoplasm based cytoplasmic male sterility

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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 65515-47-2-
1-19, 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.

Keywords: CMS line, maintainer, restorer, WA cytoplasm, O. perennis


Year: 2013
Volume: 73
Issue: 2
Article DOI: 10.5958/j.0975-6906.73.2.029
Print ISSN: 0019-5200
Online ISSN: 0975-6906


K. Thiyagarajan and S. Manonmani info_circle

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