Correlated patterns of genetic diversity and differentiation across an avian family

Van Doren, B. M., Campagna, L., Helm, B., Illera, J. C., Lovette, I. J. and Liedvogel, M. (2017) Correlated patterns of genetic diversity and differentiation across an avian family. Molecular Ecology, 26(15), pp. 3982-3997. (doi: 10.1111/mec.14083) (PMID:28256062)

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Abstract

Comparative studies of closely related taxa can provide insights into the evolutionary forces that shape genome evolution and the prevalence of convergent molecular evolution. We investigated patterns of genetic diversity and differentiation in stonechats (genus Saxicola), a widely distributed avian species complex with phenotypic variation in plumage, morphology, and migratory behavior, to ask whether similar genomic regions have become differentiated in independent, but closely related, taxa. We used whole-genome pooled sequencing of 262 individuals from 5 taxa and found that levels of genetic diversity and divergence are strongly correlated among different stonechat taxa. We then asked if these patterns remain correlated at deeper evolutionary scales and found that homologous genomic regions have become differentiated in stonechats and the closely related Ficedula flycatchers. Such correlation across a range of evolutionary divergence and among phylogenetically independent comparisons suggests that similar processes may be driving the differentiation of these independently evolving lineages, which in turn may be the result of intrinsic properties of particular genomic regions (e.g., areas of low recombination). Consequently, studies employing genome scans to search for areas important for reproductive isolation or adaptation should account for corresponding regions of differentiation, as these regions may not necessarily represent speciation islands or evidence of local adaptation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Helm, Dr Barbara
Authors: Van Doren, B. M., Campagna, L., Helm, B., Illera, J. C., Lovette, I. J., and Liedvogel, M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Molecular Ecology
Publisher:Wiley
ISSN:0962-1083
ISSN (Online):1365-294X
Published Online:03 March 2017
Copyright Holders:Copyright © 2017 John Wiley and Sons Ltd
First Published:First published in Molecular Ecology 26(15): 3982-3997
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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