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Gene flow and the genealogical history of Heliconius heurippa

BACKGROUND: The neotropical butterfly Heliconius heurippa has a hybrid colour pattern, which also contributes to reproductive isolation, making it a likely example of hybrid speciation. Here we used phylogenetic and coalescent-based analyses of multilocus sequence data to investigate the origin of H...

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Autores principales: Salazar, Camilo, Jiggins, Chris D, Taylor, Jesse E, Kronforst, Marcus R, Linares, Mauricio
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2391162/
https://www.ncbi.nlm.nih.gov/pubmed/18454858
http://dx.doi.org/10.1186/1471-2148-8-132
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author Salazar, Camilo
Jiggins, Chris D
Taylor, Jesse E
Kronforst, Marcus R
Linares, Mauricio
author_facet Salazar, Camilo
Jiggins, Chris D
Taylor, Jesse E
Kronforst, Marcus R
Linares, Mauricio
author_sort Salazar, Camilo
collection PubMed
description BACKGROUND: The neotropical butterfly Heliconius heurippa has a hybrid colour pattern, which also contributes to reproductive isolation, making it a likely example of hybrid speciation. Here we used phylogenetic and coalescent-based analyses of multilocus sequence data to investigate the origin of H. heurippa. RESULTS: We sequenced a mitochondrial region (CoI and CoII), a sex-linked locus (Tpi) and two autosomal loci (w and sd) from H. heurippa and the putative parental species, H. cydno and H. melpomene. These were analysed in combination with data from two previously sequenced autosomal loci, Dll and Inv. H. heurippa was monophyletic at mtDNA and Tpi, but showed a shared distribution of alleles derived from both parental lineages at all four autosomal loci. Estimates of genetic differentiation showed that H. heurippa is closer to H. cydno at mtDNA and three autosomal loci, intermediate at Tpi, and closer to H. melpomene at Dll. Using coalescent simulations with the Isolation-Migration model (IM), we attempted to establish the incidence of gene flow in the origin of H. heurippa. This analysis suggested that ongoing introgression is frequent between all three species and variable in extent between loci. CONCLUSION: Introgression, which is a necessary precursor of hybrid speciation, seems to have also blurred the coalescent history of these species. The origin of Heliconius heurippa may have been restricted to introgression of few colour pattern genes from H. melpomene into the H. cydno genome, with little evidence of genomic mosaicism.
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spelling pubmed-23911622008-05-22 Gene flow and the genealogical history of Heliconius heurippa Salazar, Camilo Jiggins, Chris D Taylor, Jesse E Kronforst, Marcus R Linares, Mauricio BMC Evol Biol Research Article BACKGROUND: The neotropical butterfly Heliconius heurippa has a hybrid colour pattern, which also contributes to reproductive isolation, making it a likely example of hybrid speciation. Here we used phylogenetic and coalescent-based analyses of multilocus sequence data to investigate the origin of H. heurippa. RESULTS: We sequenced a mitochondrial region (CoI and CoII), a sex-linked locus (Tpi) and two autosomal loci (w and sd) from H. heurippa and the putative parental species, H. cydno and H. melpomene. These were analysed in combination with data from two previously sequenced autosomal loci, Dll and Inv. H. heurippa was monophyletic at mtDNA and Tpi, but showed a shared distribution of alleles derived from both parental lineages at all four autosomal loci. Estimates of genetic differentiation showed that H. heurippa is closer to H. cydno at mtDNA and three autosomal loci, intermediate at Tpi, and closer to H. melpomene at Dll. Using coalescent simulations with the Isolation-Migration model (IM), we attempted to establish the incidence of gene flow in the origin of H. heurippa. This analysis suggested that ongoing introgression is frequent between all three species and variable in extent between loci. CONCLUSION: Introgression, which is a necessary precursor of hybrid speciation, seems to have also blurred the coalescent history of these species. The origin of Heliconius heurippa may have been restricted to introgression of few colour pattern genes from H. melpomene into the H. cydno genome, with little evidence of genomic mosaicism. BioMed Central 2008-05-02 /pmc/articles/PMC2391162/ /pubmed/18454858 http://dx.doi.org/10.1186/1471-2148-8-132 Text en Copyright ©2008 Salazar et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Salazar, Camilo
Jiggins, Chris D
Taylor, Jesse E
Kronforst, Marcus R
Linares, Mauricio
Gene flow and the genealogical history of Heliconius heurippa
title Gene flow and the genealogical history of Heliconius heurippa
title_full Gene flow and the genealogical history of Heliconius heurippa
title_fullStr Gene flow and the genealogical history of Heliconius heurippa
title_full_unstemmed Gene flow and the genealogical history of Heliconius heurippa
title_short Gene flow and the genealogical history of Heliconius heurippa
title_sort gene flow and the genealogical history of heliconius heurippa
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2391162/
https://www.ncbi.nlm.nih.gov/pubmed/18454858
http://dx.doi.org/10.1186/1471-2148-8-132
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