Population structure and genetic diversity in the invasive freshwater snail Galba schirazensis (Lymnaeidae)

Abstract : We studied the population genetic structure of the freshwater snail Galba schirazensis (Küster, 1862), a potential vector of infectious diseases such as fascioliasis. Galba schirazensis has now a worldwide distribution but a poorly known origin because this species has been distinguished only recently from the morphologically similar and cosmopolitan Galba truncatula (O.F. Müller, 1774).Wedevelopedspecificmicrosatellitemarkersandsequencedamitochondrialgene(cytochromeoxidasesubunitI(CO1))tostudy individuals of G. schirazensis from the Old World and the New World. We found very low genetic diversity within populations, no heterozygotes,andmarkedpopulationstructure—apatternobservedinotherhighlyselfinglymnaeidspecieswithrecentlyenlarged distributions as a result of biological invasions. The total lack of observed heterozygosity in the few populations of G. schirazensis that displayedsomeallelicdiversitysuggestshighselfingrates.Wealsofoundthatthecenterofdiversity,andbyextensiontheoriginarea of this species, should be found in the New World, whereas Old World populations should rather result from a recent introduction of a genetically uniform population. The microsatellite markers developed here will help to clarify the history of expansion of G. schirazensis and might help to understand its role as a potential vector of infectious diseases.
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https://hal-univ-perp.archives-ouvertes.fr/hal-01953197
Contributor : Dorian Miler <>
Submitted on : Wednesday, December 12, 2018 - 4:43:52 PM
Last modification on : Monday, November 18, 2019 - 3:39:54 PM

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  • HAL Id : hal-01953197, version 1

Citation

M. Lounnas, A.C. Correa, P. Alda, P. David, M. Dubois, et al.. Population structure and genetic diversity in the invasive freshwater snail Galba schirazensis (Lymnaeidae). Canadian Journal of Zoology, NRC Research Press, 2018, 96 (5), pp.425-435. ⟨hal-01953197⟩

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