IR-36 was developed through breeding of

Six rice varieties and Oryza nivara

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13 rice varieties and Oryza nivara

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Oryza sativa and O. indica

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Oryza indica and O. nivara

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Solution

The correct option is B 13 rice varieties and Oryza nivara
Gurdev S. Khush crossed 13 varieties of rice from Oryza nivara to develop IR - 36 which was resistant to grassy stunt virus.

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