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Development of rice blast differential lines and the evaluation of partial resistance for the breeding of durable rice varieties in the tropics


Development of rice blast differential lines and the evaluation of partial resistance for the breeding of durable rice varieties in the tropics



JIRCAS Working Report 40: 3-21



Breeding of rice varieties with durable resistance to blast is the most logical and environment-friendly approach. Major gene and partial resistance is known. Information about the virulence of rice blast isolates is important for genetic studies and breeding of resistant varieties. We have tested the pathogenicity of a few hundred blast isolates by inoculating them to Japanese differential varieties and IRRI near-isogenic lines (NILs) having known resistance genes.

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