Fine mapping of the R-SC8 locus and expression analysis of candidate SMV resistance genes in soybean

文献类型: 外文期刊

第一作者: Zhao, Lin

作者: Zhao, Lin;Wang, Dagang;Zhang, Hongyun;Shen, Yingchao;Yang, Yongqing;Li, Kai;Wang, Liqun;Yang, Yunhua;Zhi, Haijian;Wang, Dagang

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关键词: fine mapping;resistance gene;soybean mosaic virus;soybean

期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )

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年卷期:

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收录情况: SCI

摘要: Soybean mosaic disease, caused by soybean mosaic virus (SMV), is one of the most broadly distributed viral diseases of soybean (Glycine max [L.] Merr.) worldwide, which decreases seed quality and causes serious losses in yields. The accession Kefeng No.1' was previously shown to carry the R-SC8 gene on chromosome 2, which confers resistance to SMV strain SC8. To fine map the R-SC8 gene, we generated larger F-2 population (2122 plants) from the cross between resistant accession Kefeng No.1' and susceptible variety Nannong 1138-2'. Using eight genomic-SSR markers including four newly developed markers, we mapped this gene to a 30.8-kb region containing two annotated genes between two markers, ZL-42 and ZL-52, on chromosome 2. The expression of genes Glyma.02G121500 and Glyma.02G121600 (encoding MADS-box proteins) was higher in Kefeng No.1' plants than that in Nannong 1138-2' plants, as determined by quantitative reverse transcription-polymerase chain reaction (QRT-PCR). These results suggest that the two genes are likely involved in conferring SMV resistance. This study willfacilitate marker-assisted selection of this gene for use in soybean breeding programmes.

分类号: S3

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