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Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
Characterizing the patterns of hybridization between closely related species is crucial to understand the role of gene flow in speciation. In particular, systems comprising multiple contacts between sister species offer an outstanding opportunity to investigate how reproductive isolation varies with...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7029087/ https://www.ncbi.nlm.nih.gov/pubmed/32076505 http://dx.doi.org/10.1002/ece3.5943 |
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author | Costa, Diana Sotelo, Graciela Kaliontzopoulou, Antigoni Carvalho, João Butlin, Roger Hollander, Johan Faria, Rui |
author_facet | Costa, Diana Sotelo, Graciela Kaliontzopoulou, Antigoni Carvalho, João Butlin, Roger Hollander, Johan Faria, Rui |
author_sort | Costa, Diana |
collection | PubMed |
description | Characterizing the patterns of hybridization between closely related species is crucial to understand the role of gene flow in speciation. In particular, systems comprising multiple contacts between sister species offer an outstanding opportunity to investigate how reproductive isolation varies with environmental conditions, demography and geographic contexts of divergence. The flat periwinkles, Littorina obtusata and L. fabalis (Gastropoda), are two intertidal sister species with marked ecological differences compatible with late stages of speciation. Although hybridization between the two was previously suggested, its extent across the Atlantic shores of Europe remained largely unknown. Here, we combined genetic (microsatellites and mtDNA) and morphological data (shell and male genital morphology) from multiple populations of flat periwinkles in north‐western Iberia to assess the extent of current and past hybridization between L. obtusata and L. fabalis under two contrasting geographic settings of divergence (sympatry and allopatry). Hybridization signatures based on both mtDNA and microsatellites were stronger in sympatric sites, although evidence for recent extensive admixture was found in a single location. Misidentification of individuals into species based on shell morphology was higher in sympatric than in allopatric sites. However, despite hybridization, species distinctiveness based on this phenotypic trait together with male genital morphology remained relatively high. The observed variation in the extent of hybridization among locations provides a rare opportunity for future studies on the consequences of different levels of gene flow for reinforcement, thus informing about the mechanisms underlying the completion of speciation. |
format | Online Article Text |
id | pubmed-7029087 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-70290872020-02-19 Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata Costa, Diana Sotelo, Graciela Kaliontzopoulou, Antigoni Carvalho, João Butlin, Roger Hollander, Johan Faria, Rui Ecol Evol Original Research Characterizing the patterns of hybridization between closely related species is crucial to understand the role of gene flow in speciation. In particular, systems comprising multiple contacts between sister species offer an outstanding opportunity to investigate how reproductive isolation varies with environmental conditions, demography and geographic contexts of divergence. The flat periwinkles, Littorina obtusata and L. fabalis (Gastropoda), are two intertidal sister species with marked ecological differences compatible with late stages of speciation. Although hybridization between the two was previously suggested, its extent across the Atlantic shores of Europe remained largely unknown. Here, we combined genetic (microsatellites and mtDNA) and morphological data (shell and male genital morphology) from multiple populations of flat periwinkles in north‐western Iberia to assess the extent of current and past hybridization between L. obtusata and L. fabalis under two contrasting geographic settings of divergence (sympatry and allopatry). Hybridization signatures based on both mtDNA and microsatellites were stronger in sympatric sites, although evidence for recent extensive admixture was found in a single location. Misidentification of individuals into species based on shell morphology was higher in sympatric than in allopatric sites. However, despite hybridization, species distinctiveness based on this phenotypic trait together with male genital morphology remained relatively high. The observed variation in the extent of hybridization among locations provides a rare opportunity for future studies on the consequences of different levels of gene flow for reinforcement, thus informing about the mechanisms underlying the completion of speciation. John Wiley and Sons Inc. 2020-01-21 /pmc/articles/PMC7029087/ /pubmed/32076505 http://dx.doi.org/10.1002/ece3.5943 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Costa, Diana Sotelo, Graciela Kaliontzopoulou, Antigoni Carvalho, João Butlin, Roger Hollander, Johan Faria, Rui Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata |
title | Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
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title_full | Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
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title_fullStr | Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
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title_full_unstemmed | Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
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title_short | Hybridization patterns between two marine snails, Littorina fabalis and L. obtusata
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title_sort | hybridization patterns between two marine snails, littorina fabalis and l. obtusata |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7029087/ https://www.ncbi.nlm.nih.gov/pubmed/32076505 http://dx.doi.org/10.1002/ece3.5943 |
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