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对大豆花叶病毒SMV抗性的遗传研究一直是大豆抗病遗传研究的热点之一。本研究以哈91R3-301×黑农41组合构建了遗传群体,其F2分离单株的SSR标记基因型基本符合1:2:1的比例,说明这个群体没有偏分离。根据F3株系的病情指数分布推测SMV3的F2成株抗性似乎由多基因控制。根据SSR分子标记的基因型和F2:3株系对SMV3抗病性表型结果连锁分析,推测Satt296是与大豆花叶病毒(SMV)3号株系抗性主基因连锁的分子标记,应用Joinmap作图软件将该标记定位在D1b连锁群上,这一结果与部分文献报道的研究结果一致。本研究获得的与抗性基因连锁的分子标记在其他的RIL群体中的验证得到了初步证实,推测定位在D1b连锁群上的抗性座位可能是控制SMV3的主基因之一,该标记可望应用于大豆抗SMV3的分子标记辅助选择。
Genetic research on the resistance to soybean mosaic virus SMV has been one of the hot topics in genetic research on soybean resistance. In this study, a genetic population was constructed with the combination of Ha 91R3-301 × Heinong 41, and the SSR marker genotypes of F2 segregating plants were basically consistent with the ratio of 1: 2: 1, indicating that this population did not segregate sideways. It was speculated that the F2 plant resistance of SMV3 was controlled by polygenes according to the distribution of disease index of F3 strain. According to the SSR molecular marker genotypes and F2: 3 linkage analysis of the SMV3 resistance phenotype, Satt296 was speculated to be a molecular marker linked to the major resistance gene of soybean mosaic virus (SMV) 3 strain using Joinmap The mapping software locates the marker on the D1b linkage group. This result is consistent with the findings reported in some of the literature. The verification of the molecular markers linked to the resistance gene obtained in this study in other RIL populations was preliminary confirmed. It is speculated that the resistance loci located on the D1b linkage group may be one of the major genes controlling SMV3, and the marker is expected Applied to soybean anti-SMV3 molecular marker-assisted selection.