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Genetics of fertility restoration in hybrid rice

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The cross combination involving 14 male-sterile lines in rice, when crossed with different maintainers, showed fertility restoration in certain combinations. When F2 segregating populations were classified based on spikelet fertility, fertility restoration was shown to be governed by 3∶1, 9∶3∶3∶1, and 12∶3∶1, due to allelic differences. This indicated that the cytosterility of the same group showed monogenic fertility restoration, whereas crossing plants belonging to different cystosterile groups showed a digenic pattern of segregation.

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Communicated by R. Hagemann

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Anandakumar, C.R., Subramaniam, S. Genetics of fertility restoration in hybrid rice. Theoret. Appl. Genetics 83, 994–996 (1992).

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