新疆土著大豆根瘤菌种群遗传结构的初步分析

应用重复序列REP（repetitive extragenic palindromic,重复基因外回）和ERIC（ente-robaterial repetitive intergenic consensus，肠细菌重复基因间共有序列）结合聚合酶链式反应（ERP－PCR和ERIC－PCR）对从新疆有集的27株土大豆根瘤菌染色体进行指纹分析，发现在相似水平0.5时可基本分为两大聚类群，一个类群主要包括慢生型根瘤菌，另一类群为快生型根瘤菌，来自同一地区的根瘤菌具有较高的遗传相似性，以上结果表明该技术中对大豆根瘤菌进行种群结构和遗传多样性分析的有效手段。

PRIMARY ANALYSIS OF GENETIC DEVERSITY OF SOYBEAN RHIZOBIA POPULATIONS FROMXINJIANG

Repetitive(repetitive extragenic palindromic,REP,and enterobaterial repetitive intergenic consensus,ERIC) sequences in conjunction with polymerase chain reaction technique(REP and ERIC PCR) were used to fingerprint the genomes of 27 isolates of indigenous soybean rhizobia from Xinjiang.The indigenous soybean rhizobia in Xinjiang can be clustered into relative genetic similarities of approximately 0.5,of which one group mainly includes all slow-growing rhizobia,another mainly includes all fast-growing stains. REP and ERIC PCR analysis demonstrate a substantial genetic variability within members of Xinjiang indigenous soybean rhizobial populations, which reveals that genetic similarities have certain geographical correlation, and isolates from the same site have relative higher similarities.The results show that REP and ERIC PCR analysis give effective means in genetic diversity and population structure analysis of soybean rhizobia.