Co-varieties of sugarcane obtained red rot resistance from

Saccharum munja

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S. spontaneum

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S. arundinaceum

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S. edula

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Solution

The correct option is B S. spontaneum
S.spontaneum has been the chief source of resistance to red rot and these forms are usually resistant to Pythium root rot and largely susceptible to smut. It is widely used in crosses as source of disease resistance in many present day hybrids

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