Characterization of Field Isolates of Magnaporthe oryzae with Mating Type, DNA Fingerprinting, and Pathogenicity Assays
文献类型： 外文期刊
作者： Li, Jinbin 1 ; Lu, Lin 2 ; Jia, Yulin 3 ; Wang, Qun 4 ; Fukuta, Yoshimichi 5 ; Li, Chengyun 6 ;
作者机构： 1.Yunnan Acad Agr Sci, Agr Environm & Resources Res Inst, Kunming 650205, Yunnan Province, Peoples R China
2.YAAS, Flower Res Inst, Kunming, Peoples R China
3.USDA ARS, Dale Bumpers Natl Rice Res Ctr, Stuttgart, AR USA
4.YAAS, Agr Environ & Resources Res Inst, Kunming, Peoples R China
5.Japan Int Res Ctr Agr Sci, Trop Agr Res Front, Ishigaki, Okinawa 9070002, Japan
6.Yunnan Agr Univ, Minist Educ, Key Lab Agr Biodivers & Pest Management, Kunming 650201, Yunnan Province, Peoples R China
期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）
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收录情况： SCI
摘要： Due to the harmful nature of the rice blast fungus, Magnaporthe oryzae, it is beneficial to characterize field isolates to help aid in the deployment of resistance (R) genes in rice. In the present study, 252 field isolates of M. oryzae, collected from rice fields of Yunnan Province in China, were assessed for mating type, DNA fingerprinting, and disease reactions to differential rice lines. In total, 94 isolates (37.3%) were MAT1-1 and 158 (62.7%) were MAT1-2 based on polymerase chain reaction assays, and some of them were verified with the tester isolates. All MAT1-1and MAT1-2 isolates were virulent to some of the International Rice Research Institute-Japan International Research Center for Agricultural Sciences monogenic lines harboring 22 major resistance genes as differential varieties. Three simple-sequence repeat markers were used to examine genetic diversity in all isolates. The existence of regional patterns of genetic diversity, sexual reproduction potential, and pathogenicity suggests that M. oryzae populations have been independently asexually adapted inrice fields during crop cultivation.
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