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【目的】鉴定出携带特异抗性基因的种质。【方法】利用美国的6个SMV株系(G1~G3,G5~G7)对来自26个国家和地区的254份大豆种质进行人工接种鉴定。【结果】158份材料感所有病毒株系;95份材料抗某些病毒株系;只有7份种质兼抗所有6个鉴定株系:中国种质3份(‘Kaigen’s kingenzu’PI 88486,PI 62202和PI 407733),法国种质1份(‘ItoSan’PI 189920),韩国种质1份(PI 84549),日本种质2份(‘Shirome choutan’PI 417329和‘Tousan 101’PI 507439)。14份材料对6个株系表现抗病或幼苗早期抗病,推测可能携带Rsv4基因;50份材料对6个株系的反应型与已报道的抗性等位基因类似,推测其中携带Rsv1抗性基因材料2份,Rsv1-k22份,Rsv1-y16份,Rsv1-t1份,Rsv3 10份。25份材料对6个SMV株系表现型特殊,可能携带Rsv1,Rsv3,或Rsv4位点新的等位基因。【结论】这些新的抗源可以用于SMV抗病育种的亲本。
【Objective】 Identification of germplasm carrying specific resistance genes. 【Method】 Sixty-four soybean germplasms from 26 countries and regions were inoculated by six SMV strains (G1-G3, G5-G7) in the United States. [Results] 158 strains were susceptible to all virus strains; 95 were resistant to certain virus strains; only 7 germplasms were resistant to all 6 strains identified: 3 Chinese germplasms (’Kaigen’s kingenzu’PI 88486, PI 62202 and PI 407733), 1 French flower (’ItoSan’PI 189920), 1 Korean flower (PI 84549) and 2 Japanese germplasm (’ Shirome choutan’PI 417329 and ’Tousan 101’PI 507439). Fourteen materials were resistant to disease or early seedling disease in six lines, presumably carrying Rsv4 gene. The response of 50 strains to 6 strains was similar to the reported resistance alleles, suggesting that Rsv1 2 parts of sex gene, Rsv1-k22 parts, Rsv1-y16 parts, Rsv1-t1 parts, Rsv3 10 parts. Twenty-five SMV strains showed phenotypic specificity and might carry new alleles of Rsv1, Rsv3, or Rsv4. 【Conclusion】 These new sources of resistance could be used for the parents of SMV resistant breeding.