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

S. Launez; J. Morin; S. Minery; Jean Laroche

doi:10.1111/j.0022-1112.2006.001059.x

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

S. Launez ¹ J. Morin ^{1, 2} S. Minery ¹ Jean Laroche ²

2 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)

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.

Keywords : admixture genetic structure microsatellite phylogeography restocking

Type de document :

Article dans une revue

Journal of Fish Biology, Wiley, 2006, 68 (SB), pp.193-216. 〈10.1111/j.0022-1112.2006.001059.x〉

Domaine :

Sciences de l'environnement

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http://hal.univ-brest.fr/hal-00663801
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Dernière modification le : vendredi 27 avril 2018 - 11:00:04

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

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

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