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已知大豆根瘤菌都是慢生型菌株。1982年,美国H.H.Keyser等人首次报道从我国采集的试样(土壤和根瘤)中分离出快生型大豆根瘤菌。1985年我们也从新疆阿克苏地区乌什县种植的晋豆83大豆的根瘤中分离到两株快生型大豆根瘤菌,编号为QXA001和QXA019。以北京农业大学生物工程学院微生物专业快生型大豆根瘤菌USDA205和慢生型大豆根瘤菌USDA6为对照研究表明,QXA001和QXA019的许多特性基本与USDA205相似。
Soybean Rhizobia are known to be slow-producing strains. In 1982, the United States H.H.Keyser et al. For the first time reported from the samples collected in our country (soil and nodules) isolated from fast-growing soy bean Rhizobium. In 1985, we also isolated two fast-growing soybean rhizobia strains QNA001 and QXA019 from the root nodules of Jin bean 83 planted in Wushi County, Xinjiang Aksu region. A comparative study of fast-growing soybean rhizobium USDA205 and slow-growing soybean rhizobia USDA6 from the Department of Microbiology, School of Bioengineering, Beijing Agricultural University showed that many of the characteristics of QXA001 and QXA019 are similar to those of USDA205.