QTL Mapping and Gene Cloning of Durable Resistance to Blast in Rice

Rice blast, caused by Pyricularia grisea Sacc., is a destructive disease of rice in most rice growing areas around the world. Breeding efforts have been made to introduce genes for blast resistance into desirable genetic background. Resistance to rice blast is categorized two types, complete (true) and incomplete (field resistance). Complete resistance is a hypersensitive reaction, often a complete form of resistance, and is characterized by a resistant infection type. More than 20 loci for complete blast resistance have been identified.