Microsatellite genetic variation reveals extensive introgression between wild and introduced stocks, and a new evolutionary unit in French pike Esox lucius L.

Abstract : The genetic variability of 11 French pike Esox lucius populations from rivers or extensive aquaculture ponds was analysed using seven microsatellite markers. The fish stocking of eastern European pike in French rivers is widespread, so five supplementary populations from this region were also analysed. Genetic variability within the French population was small, and similar to that previously found in Europe for this species. French populations from stocked rivers and extensive farms formed a genetically homogeneous group, and did not diverge from most eastern European samples, which may reflect either ancestral polymorphism or a complete introgression of French populations by introduced stocks. Bayesian analysis of the admixture between populations enabled identification of the French populations that were likely to be affected by introduced stocks (of local or foreign origin). Three genetically distinct evolutionary branches were identified: continental Europe, Danube basin, and south-western France. The last is a new finding in the species which needs to be further explored by comparisons with wild populations at other sites.
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Journal of Fish Biology, Wiley, 2006, 68 (SB), pp.193-216. 〈10.1111/j.0022-1112.2006.001059.x〉
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http://hal.univ-brest.fr/hal-00663801
Contributeur : Catherine Bertignac <>
Soumis le : vendredi 27 janvier 2012 - 15:47:16
Dernière modification le : jeudi 11 janvier 2018 - 06:22:24

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S. Launez, J. Morin, S. Minery, Jean Laroche. Microsatellite genetic variation reveals extensive introgression between wild and introduced stocks, and a new evolutionary unit in French pike Esox lucius L.. Journal of Fish Biology, Wiley, 2006, 68 (SB), pp.193-216. 〈10.1111/j.0022-1112.2006.001059.x〉. 〈hal-00663801〉

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