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| Vendrami, David L. J.; Houston, Ross D.; Gharbi, Karim; Telesca, Luca; Gutierrez, Alejandro P.; Gurney-smith, Helen; Hasegawa, Natsuki; Boudry, Pierre; Hoffman, Joseph I.. |
| Cultivated bivalves are important not only because of their economic value, but also due to their impacts on natural ecosystems. The Pacific oyster (Crassostrea gigas) is the world's most heavily cultivated shellfish species and has been introduced to all continents except Antarctica for aquaculture. We therefore used a medium-density single nucleotide polymorphism (SNP) array to investigate the genetic structure of this species in Europe, where it was introduced during the 1960s and has since become a prolific invader of coastal ecosystems across the continent. We analyzed 21,499 polymorphic SNPs in 232 individuals from 23 localities spanning a latitudinal cline from Portugal to Norway and including the source populations of Japan and Canada. We confirmed... |
| Tipo: Text |
Palavras-chave: Aquaculture; Crassostrea gigas; Genetic structure; High-density genotyping array; Inbreeding; Pacific oyster; Restriction site-associated DNA (RAD) sequencing; Single nucleotide polymorphism (SNP). |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00484/59561/62557.pdf |
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| De Noia, Michele; Telesca, Luca; Vendrami, David L. J.; Gokalp, Hatice K.; Charrier, Gregory; Harper, Elizabeth M.; Hoffman, Joseph I.. |
| The soft-shell clam Mya arenaria is one of the most ancient invaders of European coasts and is present in many coastal ecosystems, yet little is known about its genetic structure in Europe. We collected 266 samples spanning a latitudinal cline from the Mediterranean to the North Sea and genotyped them at 12 microsatellite loci. In parallel, geometric morphometric analysis of shell outlines was used to test for associations between shell shape, latitude and genotype, and for a selection of shells we measured the thickness and organic content of the granular prismatic (PR), the crossed-lamellar (CL) and the complex crossed-lamellar (CCL) layers. Strong population structure was detected, with Bayesian cluster analysis identifying four groups located in the... |
| Tipo: Text |
Palavras-chave: Mya arenaria; Soft-shell clam; Microsatellite; Population genetic structure; Phenotypic plasticity; Shell morphometrics. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00614/72600/71593.pdf |
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| Vendrami, David L. J.; De Noia, Michele; Telesca, Luca; Handal, William; Charrier, Gregory; Boudry, Pierre; Eberhart-phillips, Luke; Hoffman, Joseph I.. |
| Recent developments in genomics are advancing our understanding of the processes shaping population structure in wild organisms. In particular, reduced representation sequencing has facilitated the generation of dense genetic marker datasets that provide greater power for resolving population structure, investigating the role of selection and reconstructing demographic histories. We therefore used RAD sequencing to study the great scallop Pecten maximus and its sister species P. jacobeus along a latitudinal cline in Europe. Analysis of 219 samples genotyped at 82,439 single nucleotide polymorphisms clearly resolved an Atlantic and a Norwegian group within P. maximus as well as P. jacobeus, in support of previous studies. Fine-scale structure was also... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00497/60901/64240.pdf |
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