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Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica

Whether hybridization can be a mechanism that drives phenotypic diversity is a widely debated topic in evolutionary biology. In poison frogs (Dendrobatidae), assortative mating has been invoked to explain how new color morphs persist despite the expected homogenizing effects of natural selection. He...

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Detalles Bibliográficos
Autores principales: Medina, Iliana, Wang, Ian J, Salazar, Camilo, Amézquita, Adolfo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3856739/
https://www.ncbi.nlm.nih.gov/pubmed/24340180
http://dx.doi.org/10.1002/ece3.794
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author Medina, Iliana
Wang, Ian J
Salazar, Camilo
Amézquita, Adolfo
author_facet Medina, Iliana
Wang, Ian J
Salazar, Camilo
Amézquita, Adolfo
author_sort Medina, Iliana
collection PubMed
description Whether hybridization can be a mechanism that drives phenotypic diversity is a widely debated topic in evolutionary biology. In poison frogs (Dendrobatidae), assortative mating has been invoked to explain how new color morphs persist despite the expected homogenizing effects of natural selection. Here, we tested the complementary hypothesis that new morphs arise through hybridization between different color morphs. Specifically, we (1) reconstructed the phylogenetic relationships among the studied populations of a dart-poison frog to provide an evolutionary framework, (2) tested whether microsatellite allele frequencies of one putative hybrid population of the polymorphic frog O. histrionica are intermediate between O. histrionica and O. lehmanni, and (3) conducted mate-choice experiments to test whether putatively intermediate females prefer homotypic males over males from the other two populations. Our findings are compatible with a hybrid origin for the new morph and emphasize the possibility of hybridization as a mechanism generating variation in polymorphic species. Moreover, because coloration in poison frogs is aposematic and should be heavily constrained, our findings suggest that hybridization can produce phenotypic novelty even in systems where phenotypes are subject to strong stabilizing selection.
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spelling pubmed-38567392013-12-11 Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica Medina, Iliana Wang, Ian J Salazar, Camilo Amézquita, Adolfo Ecol Evol Original Research Whether hybridization can be a mechanism that drives phenotypic diversity is a widely debated topic in evolutionary biology. In poison frogs (Dendrobatidae), assortative mating has been invoked to explain how new color morphs persist despite the expected homogenizing effects of natural selection. Here, we tested the complementary hypothesis that new morphs arise through hybridization between different color morphs. Specifically, we (1) reconstructed the phylogenetic relationships among the studied populations of a dart-poison frog to provide an evolutionary framework, (2) tested whether microsatellite allele frequencies of one putative hybrid population of the polymorphic frog O. histrionica are intermediate between O. histrionica and O. lehmanni, and (3) conducted mate-choice experiments to test whether putatively intermediate females prefer homotypic males over males from the other two populations. Our findings are compatible with a hybrid origin for the new morph and emphasize the possibility of hybridization as a mechanism generating variation in polymorphic species. Moreover, because coloration in poison frogs is aposematic and should be heavily constrained, our findings suggest that hybridization can produce phenotypic novelty even in systems where phenotypes are subject to strong stabilizing selection. Blackwell Publishing Ltd 2013-11 2013-10-09 /pmc/articles/PMC3856739/ /pubmed/24340180 http://dx.doi.org/10.1002/ece3.794 Text en © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
spellingShingle Original Research
Medina, Iliana
Wang, Ian J
Salazar, Camilo
Amézquita, Adolfo
Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title_full Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title_fullStr Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title_full_unstemmed Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title_short Hybridization promotes color polymorphism in the aposematic harlequin poison frog, Oophaga histrionica
title_sort hybridization promotes color polymorphism in the aposematic harlequin poison frog, oophaga histrionica
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3856739/
https://www.ncbi.nlm.nih.gov/pubmed/24340180
http://dx.doi.org/10.1002/ece3.794
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