Environmental selection on transcriptome-derived SNPs in a high gene flow marine fish, the Atlantic herring (Clupea harengus):Environmental Adaptation in Atlantic Herring

Limborg, Morten T., Helyar, Sarah J., De Bruyn, Mark, Taylor, Martin I. ORCID: https://orcid.org/0000-0002-3858-0712, Nielsen, Einar E., Ogden, Rob, Carvalho, Gary R. and Bekkevold, Dorte (2012) Environmental selection on transcriptome-derived SNPs in a high gene flow marine fish, the Atlantic herring (Clupea harengus):Environmental Adaptation in Atlantic Herring. Molecular Ecology, 21 (15). pp. 3686-3703. ISSN 0962-1083

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Abstract

High gene flow is considered the norm for most marine organisms and is expected to limit their ability to adapt to local environments. Few studies have directly compared the patterns of differentiation at neutral and selected gene loci in marine organisms. We analysed a transcriptome-derived panel of 281 SNPs in Atlantic herring (Clupea harengus), a highly migratory small pelagic fish, for elucidating neutral and selected genetic variation among populations and to identify candidate genes for environmental adaptation. We analysed 607 individuals from 18 spawning locations in the northeast Atlantic, including two temperature clines (5–12 °C) and two salinity clines (5–35‰). By combining genome scan and landscape genetic analyses, four genetically distinct groups of herring were identified: Baltic Sea, Baltic–North Sea transition area, North Sea/British Isles and North Atlantic; notably, samples exhibited divergent clustering patterns for neutral and selected loci. We found statistically strong evidence for divergent selection at 16 outlier loci on a global scale, and significant correlations with temperature and salinity at nine loci. On regional scales, we identified two outlier loci with parallel patterns across temperature clines and five loci associated with temperature in the North Sea/North Atlantic. Likewise, we found seven replicated outliers, of which five were significantly associated with low salinity across both salinity clines. Our results reveal a complex pattern of varying spatial genetic variation among outlier loci, likely reflecting adaptations to local environments. In addition to disclosing the fine scale of local adaptation in a highly vagile species, our data emphasize the need to preserve functionally important biodiversity.

Item Type:	Article
Uncontrolled Keywords:	genome scan,haemoglobin,heat shock protein,local adaptation,salinity,single nucleotide polymorphism,sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
Faculty \ School:	Faculty of Science > School of Biological Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Organisms and the Environment Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Depositing User:	Pure Connector
Date Deposited:	02 Dec 2013 12:40
Last Modified:	09 Oct 2024 13:32
URI:	https://ueaeprints.uea.ac.uk/id/eprint/45061
DOI:	10.1111/j.1365-294X.2012.05639.x

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