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Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard

BACKGROUND: Studies of geographic variation can provide insight into the evolutionary processes involved in the early stages of biological diversification. In particular, multiple, replicated cases of geographic trait divergence present a powerful approach to study how patterns of introgression and...

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Autores principales: Ng, Julienne, Ossip-Klein, Alison G., Glor, Richard E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5029017/
https://www.ncbi.nlm.nih.gov/pubmed/27650469
http://dx.doi.org/10.1186/s12862-016-0763-4
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author Ng, Julienne
Ossip-Klein, Alison G.
Glor, Richard E.
author_facet Ng, Julienne
Ossip-Klein, Alison G.
Glor, Richard E.
author_sort Ng, Julienne
collection PubMed
description BACKGROUND: Studies of geographic variation can provide insight into the evolutionary processes involved in the early stages of biological diversification. In particular, multiple, replicated cases of geographic trait divergence present a powerful approach to study how patterns of introgression and adaptive divergence can vary with geographic space and time. In this study, we conduct replicated, fine-scaled molecular genetic analyses of striking geographic dewlap color variation of a Hispaniolan Anolis lizard, Anolis distichus, to investigate whether adaptive trait divergence is consistently associated with speciation, whereby genetic divergence is observed with neutral markers, or whether locally adapted traits are maintained in the face of continued gene flow. RESULTS: We find instances where shifts in adaptive dewlap coloration across short geographic distances are associated with reproductive isolation as well as maintained in the face of gene flow, suggesting the importance of both processes in maintaining geographic dewlap variation. CONCLUSION: Our study suggests that adaptive dewlap color differences are maintained under strong divergent natural selection, but this divergence does not necessarily lead to anole speciation. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s12862-016-0763-4) contains supplementary material, which is available to authorized users.
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spelling pubmed-50290172016-09-22 Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard Ng, Julienne Ossip-Klein, Alison G. Glor, Richard E. BMC Evol Biol Research Article BACKGROUND: Studies of geographic variation can provide insight into the evolutionary processes involved in the early stages of biological diversification. In particular, multiple, replicated cases of geographic trait divergence present a powerful approach to study how patterns of introgression and adaptive divergence can vary with geographic space and time. In this study, we conduct replicated, fine-scaled molecular genetic analyses of striking geographic dewlap color variation of a Hispaniolan Anolis lizard, Anolis distichus, to investigate whether adaptive trait divergence is consistently associated with speciation, whereby genetic divergence is observed with neutral markers, or whether locally adapted traits are maintained in the face of continued gene flow. RESULTS: We find instances where shifts in adaptive dewlap coloration across short geographic distances are associated with reproductive isolation as well as maintained in the face of gene flow, suggesting the importance of both processes in maintaining geographic dewlap variation. CONCLUSION: Our study suggests that adaptive dewlap color differences are maintained under strong divergent natural selection, but this divergence does not necessarily lead to anole speciation. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s12862-016-0763-4) contains supplementary material, which is available to authorized users. BioMed Central 2016-09-20 /pmc/articles/PMC5029017/ /pubmed/27650469 http://dx.doi.org/10.1186/s12862-016-0763-4 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Ng, Julienne
Ossip-Klein, Alison G.
Glor, Richard E.
Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title_full Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title_fullStr Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title_full_unstemmed Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title_short Adaptive signal coloration maintained in the face of gene flow in a Hispaniolan Anolis Lizard
title_sort adaptive signal coloration maintained in the face of gene flow in a hispaniolan anolis lizard
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5029017/
https://www.ncbi.nlm.nih.gov/pubmed/27650469
http://dx.doi.org/10.1186/s12862-016-0763-4
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