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Temporal and spatial instability in neutral and adaptive (MHC) genetic variation in marginal salmon populations / Kate L. Ciborowski; William C. Jordan; Carlos Garcia De Leaniz; S. Consuegra; Sofia Consuegra del Olmo

Scientific Reports, Volume: 7, Start page: 42416

Swansea University Authors: Carlos, Garcia De Leaniz, Sofia, Consuegra del Olmo

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DOI (Published version): 10.1038/srep42416

Abstract

The role of marginal populations for the long-term maintenance of species’ genetic diversity and evolutionary potential is particularly timely in view of the range shifts caused by climate change. The Centre-Periphery hypothesis predicts that marginal populations should bear reduced genetic diversit...

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Published in: Scientific Reports
Published: 2017
URI: https://cronfa.swan.ac.uk/Record/cronfa32926
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Abstract: The role of marginal populations for the long-term maintenance of species’ genetic diversity and evolutionary potential is particularly timely in view of the range shifts caused by climate change. The Centre-Periphery hypothesis predicts that marginal populations should bear reduced genetic diversity and have low evolutionary potential. We analysed temporal stability at neutral microsatellite and adaptive MHC genetic variation over five decades in four marginal Atlantic salmon populations located at the southern limit of the species’ distribution with a complicated demographic history, which includes stocking with foreign and native salmon for at least 2 decades. We found a temporal increase in neutral genetic variation, as well as temporal instability in population structuring, highlighting the importance of temporal analyses in studies that examine the genetic diversity of peripheral populations at the margins of the species’ range, particularly in face of climate change.
College: College of Science
Start Page: 42416