In prokaryotic taxonomy, a set of criteria is commonly used to delineate species. These criteria are generally based on cohesion at the phylogenetic, phenotypic and genomic levels. One such criterion shown to have promise ...

Bradyrhizobium is thought to be the largest and most diverse rhizobial genus, but this is not reflected in the number of described species. Although it was one of the first rhizobial genera recognised, its taxonomy remains ...

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Many gene flow barriers associated with genetic isolation during eukaryotic species divergence, are lacking in prokaryotes. In these organisms the processes associated with horizontal gene transfer (HGT) may provide both ...