The DNA G+C mol% for extra-slow-growing soybean rhizobia (ESG) and DNA homology for ESG strains and other rhizobia were carried out by thermal denatu-ration temperature (Tm) and reassociation rate of DNA, respectively.

• 用热变性温度法和液相复性速率法分别测定了超慢生大豆根瘤菌(ESG；extra-slow-growing soybean rhizobia)DNA G+C mol%25及与其它根瘤菌间的DNA同源性.