Liao L, Chen P, Buss G R, Yang Q, Tolin S A
Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
J Hered. 2002 Nov-Dec;93(6):447-52. doi: 10.1093/jhered/93.6.447.
Soybean mosaic disease caused by soybean mosaic virus (SMV) occurs wherever soybean [Glycine max (L.) Merr.] is grown and is considered one of the most important soybean diseases in many areas of the world. Use of soybean cultivars with resistance to SMV is a very effective way of controlling the disease. China has rich soybean germplasm, but there is very limited information on genetics of SMV resistance in Chinese soybean germplasm and reaction of the resistance genes to SMV strains G1-G7. There also is no report on allelic relationships of resistance genes in Chinese soybeans with other named genes at the three identified loci Rsv1, Rsv3, and Rsv4. The objectives of this study were to examine reactions of Chinese soybean cultivar Zao18 to SMV strains G1-G3 and G5-G7, to reveal the inheritance of SMV resistance in Zao18 and to determine the allelic relationship of resistance genes in Zao18 with previously reported resistance genes. Zao18 was crossed with the SMV-susceptible cultivar Lee 68 to study the inheritance of resistance. Zao18 was also crossed with the resistant lines PI96983, L29, and V94-5152, which possess Rsv1, Rsv3, and Rsv4, respectively, to examine the allelic relationship between the genes in Zao18 and genes at these three loci. Our research results indicated that Zao18 possesses two independent dominant genes for SMV resistance, one of which is allelic to the Rsv3 locus; the other is allelic with Rsv1. The presence of both genes (Rsv1 and Rsv3) in Zao18 confers resistance to SMV strains G1-G7.
由大豆花叶病毒（SMV）引起的大豆花叶病在大豆[Glycine max (L.) Merr.]种植区普遍发生，被认为是世界许多地区最重要的大豆病害之一。使用对SMV具有抗性的大豆品种是控制该病的一种非常有效的方法。中国拥有丰富的大豆种质资源，但关于中国大豆种质中SMV抗性的遗传信息以及抗性基因对SMV株系G1 - G7的反应非常有限。关于中国大豆中抗性基因与在已确定的三个位点Rsv1、Rsv3和Rsv4处的其他命名基因的等位关系也没有报道。本研究的目的是检测中国大豆品种早18对SMV株系G1 - G3和G5 - G7的反应，揭示早18中SMV抗性的遗传方式，并确定早18中抗性基因与先前报道的抗性基因的等位关系。早18与感SMV品种Lee 68杂交以研究抗性的遗传。早18还与分别具有Rsv1、Rsv3和Rsv4的抗性品系PI96983、L29和V94 - 5152杂交，以检测早18中的基因与这三个位点的基因之间的等位关系。我们的研究结果表明，早18拥有两个独立的显性SMV抗性基因，其中一个与Rsv3位点等位；另一个与Rsv1等位。早18中这两个基因（Rsv1和Rsv3）的存在赋予了对SMV株系G1 - G7的抗性。
