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Development of Genomic SSR Markers and Analysis of Genetic Diversity of 40 Haploid Isolates of Ustilago maydis in China

文献类型： 外文期刊

作者： Zhang, Meijing 1 ; Chen, Yanping 1 ; Yuan, Jianhua 1 ; Meng, Qingchang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, Nanjing 210014, Jiangsu, Peoples R China

关键词： Genetic diversity;Mating type;Simple sequence repeats (SSR);Ustilago maydis

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2015 年 17 卷 2 期

页码：

收录情况： SCI

摘要： Ustilago maydis (DC) Corda is an important pathogen of maize (Zea mays L.) in China. The poorly defined genetic diversity of this pathogen hinders efforts to better predict and complement resistance of maize in the breeding programs. In this study, we developed 2196 SSR markers in U. maydis, of which 122 were successfully experimentally validated and used to analyze genetic diversity and population structure of the 40 U. maydis isolates. In total, these markers generated 488 alleles with an average of 4.0 alleles per marker. The PIC values ranged from 0.094 to 0.811 with an average of 0.479. The averaged genetic similarity was 0.462 among all isolates. Cluster analysis and population structure analysis both classified the 40 isolates into six different groups. Group classification showed no clear relationship with mating type locus 'a' or the geographical origin of the studied isolates. This study demonstrates a unique genetic diversity among U. maydis haplotypes in corn production areas in China. (C) 2015 Friends Science Publishers

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