大豆对SMV SC-3株系的抗性遗传和QTL分析  

Analysis of Resistance Inheritance to Soybean Mosaic Virus(SMV)Strain SC-3 and Mapping Related QTL in Soybean

作　　者：郭丹丹[1,2] 陈海峰[1] 杨中路[1] 单志慧[1] 朱晓玲[1] 陈水莲[1] 周新安[1] 周蓉[1] 

机构地区：[1]中国农业科学院油料作物研究所,农业部油料作物生物学与遗传育种重点开放实验室,湖北武汉430062 [2]中国农业科学院研究生院,北京100081

出　　处：《大豆科学》2012年第4期511-516,共6页Soybean Science

基　　金：国家自然科学基金(30871554,30900906);现代农业产业技术体系建设专项资金

摘　　要：为研究大豆对SMV抗扩展的遗传机制,以中豆29×中豆32构建的重组自交系群体(RIL)为材料,人工接种SC-3株系。以病情指数为抗性指标,应用主基因+多基因混合遗传模型进行遗传分析,利用复合区间作图法进行QTL定位。结果表明:该RIL群体对SC-3株系的抗性遗传符合B-2-3遗传模型,即抗性由2对等加性主基因控制,加性效应为-9.78,主基因遗传率为97.65%。在3个染色体上检测到3个抗性相关QTL,表型贡献率为10.80%～13.41%。In order to study the genetic mechanism of resistance in development to Soybean Mosaic Virus（SMV）in soybean[Glycine max（L.）Merr.],a recombinant inbred line（RIL）population consisting of 144 lines derived from Zhongdou No.29 × Zhongdou No.32 was inoculated with the SMV strain SC-3.Genetic analysis was conducted by the major gene plus polygene mixed inheritance model,and QTLs were detected by composite interval mapping（CIM）based on the resistance reaction indicated by disease index.The results showed that the inheritance of resistance to strain SC-3 was controlled by two equality-additive major gene with an additive effect of-9.78 and a heritability of 97.65% for the major genes.Three QTLs were detected on chromosome 6,10 and 13 respectively,explaining 10.80%-13.41% of phenotypic variation.

关 键 词：大豆 SMV 遗传分析 QTL 

分 类 号：S565.1[农业科学—作物学]