Evidence from internally transcribed spacer sequence analysis of soybean strains that extant Bradyrhizobium spp. are likely the products of reticulate evolutionary events.

Abstract excerpt

The internally transcribed spacer (ITS) sequences of several members within each of 17 soybean bradyrhizobial serogroups were determined to establish whether the regions within all members of each serogroup were identical. The rationale was to provide a sequence-based alternative to serology. The objective also was to link the extensive older literature on soybean symbiosis based on serology with ITS sequence...

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