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Identification and mapping of a rice blast resistance gene Pi‐g(t) in the cultivar Guangchangzhan
Author(s) -
Zhou J. H.,
Wang J. L.,
Xu J. C.,
Lei C. L.,
Ling Z. Z.
Publication year - 2004
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.0032-0862.2004.00986.x
Subject(s) - centimorgan , biology , magnaporthe grisea , backcrossing , oryza sativa , gene , genetics , cultivar , gene mapping , botany , r gene , chromosome , plant disease resistance
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) .