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Population genetic structure and mating systems in hermaphrodite freshwater snails: The examples of Bulinus globosus and B. truncatus

Population genetic structure and mating systems in hermaphrodite freshwater snails: The examples of Bulinus globosus and B. truncatus

Malacological Review Suppl 0(6): 115-120

Gene flow and genetic drift are major determinants of population genetic structure. In hermaphrodite freshwater snails, the mating system is also a key factor because these snails are able to reproduce by both selfing and outcrossing. Bulinus globosus was thought to be a typical outcrosser. We show here that this species can reproduce by selfing and outcrossing depending on the population. In B. truncatus a mixed (selfing and outcrossing) mating system is maintained in relation with aphally and allotetraploidy. The influence of selfing on population genetic structure seems to be a lower genetic variability although data are scarce.

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