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以自新疆、黑龙江、辽宁、吉林、湖北、天津和北京等地分离的１６株快生型大豆根瘤菌为供试菌，用交叉凝集反应比较研究了它们与目前国内外已报道的９株快生型大豆根瘤菌标准血清型菌株之间的血清学关系，研究结果表明：（１）菌株Ｊ７１１，ＮＪ１６，ＮＪ１１１和Ａ２１２均属Ｏ１（２０４８）血清型。（２）菌株ＲＴ１５、Ｔｗｏ－７和９３Ｆ４１与供试标准血清型菌株的菌体抗原均不相同，命名为Ｏ９、Ｏ１０和Ｏ１１３种新的血清型。菌株６－１为自凝菌株，其血清型为Ｏ０。（３）交叉抗原吸收试验结果表明，菌株９２Ｘ１０、Ｃ３３３、ＲＴ１０和２０５６同属Ｏ５血清型，并可进一步区分为Ｏ５ａｂ、Ｏ５ｂｃｄ、Ｏ５ｄｅｆ和Ｏ５ｆｇ４个血清亚型。菌株ＨＡ１０－１－３、ＨＡ１２－１－１２和２１２０分属Ｏ６血清型的Ｏ６ａｂ、Ｏ６ｂｃｄ和Ｏ６ｄｅ３个血清亚型。（４）将２０４８等６个标准菌株重新命名为Ｏ１，Ｏ２，Ｏ３，Ｏ４，Ｏ７和Ｏ８血清型。
Sixteen fast-growing soybean rhizobium strains isolated from Xinjiang, Heilongjiang, Liaoning, Jilin, Hubei, Tianjin and Beijing were used as tested bacteria. Their cross-agglutination reaction was compared with that of nine fast-reported soybean strains reported at home and abroad The results showed that: (1) Strain J711, NJ16, NJ111 and A212 belong to the serotype O1 (2048) serotypes. (2) The strains RT15, Two-7 and 93F41 were different from the bacterial antigens of the tested serotype strains and named as the new serotype O9, O10 and O113. Strain 6-1 is a self-condensing strain whose serotype is O0. (3) The results of cross-antigen absorption test showed that strains 92X10, C333, RT10 and 2056 belonged to O5 serotypes and could be further divided into four subtypes O5ab, O5bcd, O5def and O5fg. Strains HA10-1-3, HA12-1-12 and 2120 belong to the O6ab, O6bcd and O6de3 serosubtypes of the O6 serotype. (4) Six standard strains such as 2048 were renamed as O1, O2, O3, O4, O7 and O8 serotypes.