Genome-wide analysis clarifies the population genetic structure of wild gilthead sea bream (Sparus aurata)
[ N/A ]
Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Public Library of Science
Access Rights
info:eu-repo/semantics/openAccess
Abstract
Gilthead sea bream is an important target for both recreational and commercial fishing in Europe, where it is also one of the most important cultured fish. Its distribution ranges from the Mediterranean to the African and European coasts of the North-East Atlantic. Until now, the population genetic structure of this species in the wild has largely been studied using microsatellite DNA markers, with minimal genetic differentiation being detected. In this geographically widespread study, 958 wild gilthead sea bream from 23 locations within the Mediterranean Sea and Atlantic Ocean were genotyped at 1159 genome-wide SNP markers by RAD sequencing. Outlier analyses identified 18 loci potentially under selection. Neutral marker analyses identified weak subdivision into three genetic clusters: Atlantic, West, and East Mediterranean. The latter group could be further subdivided into an Ionian/Adriatic and an Aegean group using the outlier markers alone. Seascape analysis suggested that this differentiation was mainly due to difference in salinity, this being also supported by preliminary genomic functional analysis. These results are of fundamental importance for the development of proper management of this species in the wild and are a first step toward the study of the potential genetic impact of the sea bream aquaculture industry. © 2021 Maroso et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Description
Keywords
Animals, Atlantic Ocean, Europe, Genetic Markers, Genetics, Population, Genome-Wide Association Study, Mediterranean Sea, Microsatellite Repeats, Polymorphism, Single Nucleotide, Sea Bream, microsatellite DNA, Adriatic Sea, Aegean Sea, animal tissue, Article, Atlantic Ocean, controlled study, gene cluster, gene identification, gene locus, genetic variability, genome analysis, genotype, Ionian Sea, Mediterranean Sea, nonhuman, population genetic structure, salinity, single nucleotide polymorphism, Sparus aurata, wild species, animal, Europe, genetic marker, genetics, genome-wide association study, population genetics, procedures, sea bream
Journal or Series
PLoS ONE
WoS Q Value
Scopus Q Value
Q1
Volume
16
Issue
1 January
