Identification and mapping of a rice blast resistance gene Pi-g(t) in the cultivar Guangchangzhan |
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| Authors: | J H Zhou † J L Wang J C Xu C L Lei Z Z Ling ‡ |
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| Institution: | Institute of Crop Breeding and Cultivation, Chinese Academy of Agricultural Sciences, Beijing 100081;and;Institute of Genetics and Development, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | 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 (BC1) and second-generation (F2) 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) . |
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| Keywords: | gene mapping Magnaporthe grisea Oryza sativa Pyricularia oryzae resistance gene simple sequence repeats |
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