Genetic Characterization of Cupped Oyster Resources in Europe Using Informative Single Nucleotide Polymorphism (SNP) Panels

Type Article
Date 2020-04
Language English
Author(s) Lapegue Sylvie1, Heurtebise Serge1, Cornette Florence1, Guichoux Erwan2, Gagnaire Pierre-Alexandre3
Affiliation(s) 1 : Ifremer, SG2M-LGPMM, 17390 La Tremblade, France
2 : Univ. Bordeaux, INRAE, BIOGECO, F-33610 Cestas, France
3 : ISEM, Univ Montpellier, CNRS, EPHE, IRD, 34000 Montpellier, France
Source Genes (2073-4425) (MDPI), 2020-04 , Vol. 11 , N. 4 , P. 451(17p.)
DOI 10.3390/genes11040451
Note This article belongs to the Special Issue Genetic Diversity of Marine Populations
Keyword(s) cupped oysters, population genetics, introgression, conservation, shellfisheries
Abstract

The Pacific oyster, Crassostrea gigas, was voluntarily introduced from Japan and British Columbia into Europe in the early 1970s, mainly to replace the Portuguese oyster, Crassostrea angulata, in the French shellfish industry, following a severe disease outbreak. Since then, the two species have been in contact in southern Europe and, therefore, have the potential to exchange genes. Recent evolutionary genomic works have provided empirical evidence that C. gigas and C. angulata exhibit partial reproductive isolation. Although hybridization occurs in nature, the rate of interspecific gene flow varies across the genome, resulting in highly heterogeneous genome divergence. Taking this biological property into account is important to characterize genetic ancestry and population structure in oysters. Here, we identified a subset of ancestry-informative makers from the most differentiated regions of the genome using existing genomic resources. We developed two different panels in order to (i) easily differentiate C. gigas and C. angulata, and (ii) describe the genetic diversity and structure of the cupped oyster with a particular focus on French Atlantic populations. Our results confirm high genetic homogeneity among Pacific cupped oyster populations in France and reveal several cases of introgressions between Portuguese and Japanese oysters in France and Portugal.

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How to cite 

Lapegue Sylvie, Heurtebise Serge, Cornette Florence, Guichoux Erwan, Gagnaire Pierre-Alexandre (2020). Genetic Characterization of Cupped Oyster Resources in Europe Using Informative Single Nucleotide Polymorphism (SNP) Panels. Genes, 11(4), 451(17p.). Publisher's official version : https://doi.org/10.3390/genes11040451 , Open Access version : https://archimer.ifremer.fr/doc/00623/73544/