中国稻瘟病菌的遗传多样性

GENETIC DIVERSITY OF RICE BLAST FUNGUS IN CHINA

用美国普度大学M.Levy实验室提供的一个散布的重复序列探针(MGR—cPB586),对中国稻区田间分离的13个稻瘟病菌株DNA的EcoRI限制性片段长度多态性进行了研究。结果表明:稻瘟病菌不同生理小种间的RFLP普遍存在,MGR—DNA指纹能清楚地区分中国稻瘟病菌的主要生理小种,并能反映出同一生理小种内复杂的亲缘关系。

The EcoRI restriction fragment length polymorphisms(RFLPs)of 13 field isolates of Pyricularia oryzae from rice growing regions in China have been studied with a dispersed repeated sequence probe(MGR—pCB586)provided by M.Levy's Lab of Purdue Univer sity.The results indicated that RFLPs existed generally in different pathogenic races of the rice blast fungus.The MGR—DNA fingerprints distinguished the major races and even the complex phylogenetic relationships among pathogenic races in China.