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Aiming at investigating the species composition and the association between ribosomal/housekeeping genes and symbiotic genes of rhizobia nodulating with soybean grown in the subtropical and tropic regions of China, a total of 252 rhizobial strains isolated from five eco-regions was characterized. Four genomic groups, Bradyrhizobium japonicum complex (including B. liaoningense, B. japonicum and a B. japonicum...
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