Environmentally associated chromosomal structural variation influences fine-scale population structure of Atlantic Salmon (Salmo salar)

K. Beth Watson, Sarah J. Lehnert, Paul Bentzen, Tony Kess, Antony Einfeldt, Steven Duffy, Ben Perriman, Sigbjørn Lien, Matthew Kent, Ian R. Bradbury

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

13 Citas (Scopus)

Resumen

Chromosomal rearrangements (e.g., inversions, fusions, and translocations) have long been associated with environmental variation in wild populations. New genomic tools provide the opportunity to examine the role of these structural variants in shaping adaptive differences within and among wild populations of non-model organisms. In Atlantic Salmon (Salmo salar), variations in chromosomal rearrangements exist across the species natural range, yet the role and importance of these structural variants in maintaining adaptive differences among wild populations remains poorly understood. We genotyped Atlantic Salmon (n = 1429) from 26 populations within a highly genetically structured region of southern Newfoundland, Canada with a 220K SNP array. Multivariate analysis, across two independent years, consistently identified variation in a structural variant (translocation between chromosomes Ssa01 and Ssa23), previously associated with evidence of trans-Atlantic secondary contact, as the dominant factor influencing population structure in the region. Redundancy analysis suggested that variation in the Ssa01/Ssa23 chromosomal translocation is strongly correlated with temperature. Our analyses suggest environmentally mediated selection acting on standing genetic variation in genomic architecture introduced through secondary contact may underpin fine-scale local adaptation in Placentia Bay, Newfoundland, Canada, a large and deep embayment, highlighting the importance of chromosomal structural variation as a driver of contemporary adaptive divergence.

Idioma originalEnglish
Páginas (desde-hasta)1057-1075
Número de páginas19
PublicaciónMolecular Ecology
Volumen31
N.º4
DOI
EstadoPublished - feb. 2022

Nota bibliográfica

Funding Information:
The authors thank the staff of the Newfoundland DFO Salmonids section for juvenile sampling, NRC for use of the plate reader, the Aquatic Biotechnology Laboratory of the Bedford Institute of Oceanography for sample preparation, CIGENE for SNP genotyping and data processing, C. Mérot for providing R scripts and guidance on GLM analyses, and Kerry Naish for her insightful feedback. This work was supported by Fisheries and Oceans Canada’s (DFO) Programme for Aquaculture Regulatory Research (PARR) and NSERC.

Funding Information:
The authors thank the staff of the Newfoundland DFO Salmonids section for juvenile sampling, NRC for use of the plate reader, the Aquatic Biotechnology Laboratory of the Bedford Institute of Oceanography for sample preparation, CIGENE for SNP genotyping and data processing, C. Mérot for providing R scripts and guidance on GLM analyses, and Kerry Naish for her insightful feedback. This work was supported by Fisheries and Oceans Canada’s (DFO) Programme for Aquaculture Regulatory Research (PARR) and NSERC.

Publisher Copyright:
© 2021 John Wiley & Sons Ltd.

ASJC Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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