黄淮海北部地区大豆育成品种(系)对黄淮海主要SMV流行株系的抗性评价

Evaluating Soybean Cultivars( Accessions) from Northern Huang-Huai-Hai Resistance to Major SMV Strains of Huang-Huai-Hai

采用人工接种方法研究了166份黄淮海北部地区近年来生产上种植品种及近期育成品种(系)对SMV的抗性,利用黄淮海地区SMV流行株系SC3、SC6、SC7、SC11以及混合4个株系进行了抗性鉴定,从客观上评价了上述品种(系)的抗性。结果显示:对4个株系均表现抗病(中抗、高抗和免疫)的共82份,占49.4%;其中对3个株系表现高抗或免疫的32份,占19.3%;对4个株系表现高抗或免疫的23份,占13.9%。对混合株系表现抗病的108份,占65.1%。其中表现免疫的45份,占27.1%,表现高抗的29份,占17.5%。对4个株系和混合株系均表现抗病的62份,占37.3%;表现免疫和高抗的14份,占8.4%。近年育成品种对SC3、SC7株系较早期育成品种的抗性显著增强;来自河北、北京、山西的品种抗性较好,病情指数整体较低。鉴定筛选出对接种的4个株系及混合株系均表现免疫的品种冀豆9号和石豆6号,可作为抗病育种的重要抗源。本研究还发现部分品种对接种的4个株系和混合株系表现出抗性差异,表明SMV株系间存在着明显的互作。

The resistances to soybean mosaic virus（ SMV） of 166 soybean cultivars（ accession）,which were widely cultivated and recently bred,were evaluated by mechanical inoculation method. Four prevalence SMV strains and mixed strain were used to evaluate the soybean cultivars（ accession） SMV resistances. Our results showed that82 cultivars（ 49. 4%） were resistant（ MR,HR,and SY） to the four strains. In these 82 soybean cultivars（ accession）,32（ 19. 3%） showed HR or SY to three strains and 23（ 13. 9%） showed SY to all four strains. After inoculated with mixed stain,108（ 65. 1%） cultivars（ accession） showed MR,HR,and SY. In these 108 soybean cultivars,45（ 27. 1%） and 29（ 17. 5%） showed SY and HR,respectively. In the 166 soybean cultivars（ accession）,62（ 37. 3%） cultivars（ accession） showed resistant（ MR,HR and SY） to the four strains and the mixed strain and 14（ 8. 4%） cultivars（ accession） showed HR and SY. Our results also revealed that the soybean resistance to SC3and SC7 was significantly enhanced in recent years. Cultivars（ accession） from Hebei,Beijing,and Shanxi were more resistant to the strains with the lower disease index. Jidou 9 and Shidou 6 were immune to all strains and could be used as resistance resources in breeding programs. Our results also suggested that interactions between strains were occurred when soybean infected with different SMV strains.