Identification and fine-mapping of a genetic locus underlying soybean tolerance to SMV infections
文献类型： 外文期刊
作者： Lin, Jing 1 ; Lan, Zejun 1 ; Hou, Wenhuan 2 ; Yang, Chunyan 2 ; Wang, Dagang 3 ; Zhang, Mengchen 2 ; Zhi, Haijian 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Life Sci, Natl Ctr Soybean Improvement, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Key Lab Crop Genet & Breeding Hebei, Shijiazhuang 050035, Hebei, Peoples R China
3.Anhui Acad Agr Sci, Crop Inst, Key Lab Crop Qual Improvement Anhui Prov, Hefei 230031, Peoples R China
关键词： Recombinant SMV; Resistance; Tolerance; Map-based cloning; Necrotic spots; MATE
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2020 年 292 卷
页码：
收录情况： SCI
摘要： Soybean mosaic virus (SMV) is a major pathogen causing yield loss. Developing soybean plants tolerant or resistant to SMV is important for mitigating the adverse effects of the viral infection. However, most studies have focused on the resistance to normal SMV strains. Thus, investigations of the resistance or tolerance to the novel recombinant SMV strain have been limited. To address the threat of the recombinant SMV, two soybean parent genotypes with contrasting reactions to the recombinant SMV and 211 F-9:11 recombinant inbred lines were evaluated under artificial inoculation conditions. The JD12 plants are resistant to the recombinant SMV, whereas HT is highly tolerant, but still susceptible. Genetic analyses suggested that the resistance of JD12 is controlled by a single dominant gene and the tolerance is a quantitative trait. The QTL mapping results revealed one QTL (qTsmv-13) for resistance and two QTLs (qTsmv-2 and qTsmv-3) for tolerance. A comparison between known resistance genes and the QTLs identified in this study suggested that qTsmv-13 and qTsmv-2 may correspond to Rsvl and Rsv4, respectively, whereas qTsmv-3 represents a newly identified QTL for SMV tolerance. We further delimited qTsmv-3 to an interval of approximately 86 kb with a map-based cloning strategy. Only two of five candidate genes, Glyma.03G00550 and Glyma.03G00570, varied between the parents. Additionally, Glyma.03G00550, which is a multidrug and toxic compound extrusion transporter gene, is the likely candidate gene for qTsmv-3. In summary, our research opens a new avenue for formulating strategies to breed soybean varieties tolerant to SMV.
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