Macroevolution of plasmids: a model for plasmid speciation.

Abstract excerpt

A new evolutionary model for diversification in plasmid incompatibility groups (plasmid speciation) is suggested. The model is based on the formation of plasmid cointegrates from two compatible plasmids. The existence of plasmid cointegrates is well known, however, their potential key role in plasmid macroevolution has not yet been recognized. In a hypothesis presented here, one of the rep genes is supposed to be...

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