Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data
International audience Speciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. Hence, sympatric speciation might be common, with American and European eel being candidates for exemplifying this. They show disjunct continental distributions on both sides...
Published in: | Molecular Ecology |
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ftecolephe:oai:HAL:hal-03065758v1 2024-05-19T07:28:35+00:00 Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data Nikolic, Natacha Liu, Shenglin Jacobsen, Magnus, W Jónsson, Bjarni Bernatchez, Louis Gagnaire, Pierre-Alexandre Hansen, Michael, M Institut de Biologie Intégrative et des Systèmes Québec (IBIS) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) 2020-02 https://hal.science/hal-03065758 https://doi.org/10.1111/mec.15342 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/mec.15342 hal-03065758 https://hal.science/hal-03065758 doi:10.1111/mec.15342 ISSN: 0962-1083 EISSN: 1365-294X Molecular Ecology https://hal.science/hal-03065758 Molecular Ecology, 2020, 29 (3), pp.565-577. ⟨10.1111/mec.15342⟩ [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/article Journal articles 2020 ftecolephe https://doi.org/10.1111/mec.15342 2024-05-02T00:18:20Z International audience Speciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. Hence, sympatric speciation might be common, with American and European eel being candidates for exemplifying this. They show disjunct continental distributions on both sides of the Atlantic, but spawn in overlapping regions of the Sargasso Sea from where juveniles are advected to North American, European and North African coasts. Hybridization and introgression are known to occur, with hybrids almost exclusively observed in Iceland. Different speciation scenarios have been suggested, involving either vicariance or sympatric ecological speciation. Using RAD sequencing and whole‐genome sequencing data from parental species and F1 hybrids, we analysed speciation history based on the joint allele frequency spectrum (JAFS) and pairwise sequentially Markovian coalescent (PSMC) plots. JAFS supported a model involving a split without gene flow 150,000–160,000 generations ago, followed by secondary contact 87,000–92,000 generations ago, with 64% of the genome experiencing restricted gene flow. This supports vicariance rather than sympatric speciation, likely associated with Pleistocene glaciation cycles and ocean current changes. Whole‐genome PSMC analysis of F1 hybrids from Iceland suggested divergence 200,000 generations ago and indicated subsequent gene flow rather than strict isolation. Finally, simulations showed that results from both approaches (JAFS and PSMC) were congruent. Hence, there is strong evidence against sympatric speciation in North Atlantic eels. These results reiterate the need for careful consideration of cases of possible sympatric speciation, as even in seemingly barrier‐free oceanic environments palaeoceanographic factors may have promoted vicariance and allopatric speciation. Article in Journal/Newspaper Anguilla anguilla European eel Iceland North Atlantic EPHE (Ecole pratique des hautes études, Paris): HAL Molecular Ecology 29 3 565 577 |
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Open Polar |
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EPHE (Ecole pratique des hautes études, Paris): HAL |
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ftecolephe |
language |
English |
topic |
[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
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[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] Nikolic, Natacha Liu, Shenglin Jacobsen, Magnus, W Jónsson, Bjarni Bernatchez, Louis Gagnaire, Pierre-Alexandre Hansen, Michael, M Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
topic_facet |
[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
description |
International audience Speciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. Hence, sympatric speciation might be common, with American and European eel being candidates for exemplifying this. They show disjunct continental distributions on both sides of the Atlantic, but spawn in overlapping regions of the Sargasso Sea from where juveniles are advected to North American, European and North African coasts. Hybridization and introgression are known to occur, with hybrids almost exclusively observed in Iceland. Different speciation scenarios have been suggested, involving either vicariance or sympatric ecological speciation. Using RAD sequencing and whole‐genome sequencing data from parental species and F1 hybrids, we analysed speciation history based on the joint allele frequency spectrum (JAFS) and pairwise sequentially Markovian coalescent (PSMC) plots. JAFS supported a model involving a split without gene flow 150,000–160,000 generations ago, followed by secondary contact 87,000–92,000 generations ago, with 64% of the genome experiencing restricted gene flow. This supports vicariance rather than sympatric speciation, likely associated with Pleistocene glaciation cycles and ocean current changes. Whole‐genome PSMC analysis of F1 hybrids from Iceland suggested divergence 200,000 generations ago and indicated subsequent gene flow rather than strict isolation. Finally, simulations showed that results from both approaches (JAFS and PSMC) were congruent. Hence, there is strong evidence against sympatric speciation in North Atlantic eels. These results reiterate the need for careful consideration of cases of possible sympatric speciation, as even in seemingly barrier‐free oceanic environments palaeoceanographic factors may have promoted vicariance and allopatric speciation. |
author2 |
Institut de Biologie Intégrative et des Systèmes Québec (IBIS) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Nikolic, Natacha Liu, Shenglin Jacobsen, Magnus, W Jónsson, Bjarni Bernatchez, Louis Gagnaire, Pierre-Alexandre Hansen, Michael, M |
author_facet |
Nikolic, Natacha Liu, Shenglin Jacobsen, Magnus, W Jónsson, Bjarni Bernatchez, Louis Gagnaire, Pierre-Alexandre Hansen, Michael, M |
author_sort |
Nikolic, Natacha |
title |
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
title_short |
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
title_full |
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
title_fullStr |
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
title_full_unstemmed |
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analysed using genomic data |
title_sort |
speciation history of european (anguilla anguilla) and american eel (a. rostrata), analysed using genomic data |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03065758 https://doi.org/10.1111/mec.15342 |
genre |
Anguilla anguilla European eel Iceland North Atlantic |
genre_facet |
Anguilla anguilla European eel Iceland North Atlantic |
op_source |
ISSN: 0962-1083 EISSN: 1365-294X Molecular Ecology https://hal.science/hal-03065758 Molecular Ecology, 2020, 29 (3), pp.565-577. ⟨10.1111/mec.15342⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/mec.15342 hal-03065758 https://hal.science/hal-03065758 doi:10.1111/mec.15342 |
op_doi |
https://doi.org/10.1111/mec.15342 |
container_title |
Molecular Ecology |
container_volume |
29 |
container_issue |
3 |
container_start_page |
565 |
op_container_end_page |
577 |
_version_ |
1799474679154475008 |