Identification and mapping of a rice blast resistance gene Pi‐g(t) in the cultivar Guangchangzhan

A single dominant blast resistance gene was identified in Chinese indica rice ( Oryza sativa ) cv. Guangchangzhan (GCZ), which shows complete resistance to Japanese isolate Ken53‐33 of Magnaporthe grisea . Genetic analysis of the backcross (BC 1 ) and second‐generation (F 2 ) populations from a cross between susceptible cv. Lijiangxintuanheigu (LTH) and GCZ indicated that the resistance was conferred by one dominant gene. This gene was mapped on the long arm of chromosome 2 and flanked by RM166 and RM208 at distances of 4·00 ± 4·90 and 6·30 ± 4·89 cM (centiMorgans), respectively. It was designated tentatively as Pi‐g(t) .