Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels
International audience Investigating patterns of genetic variation in hybridizing species provides an opportunity to understand the impact of natural selection on intraspecific genetic variability and interspecific gene exchange. The Atlantic eels Anguilla rostrata and A. anguilla each occupy a larg...
Published in: | Molecular Ecology |
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Online Access: | https://hal.archives-ouvertes.fr/halsde-00373273 https://doi.org/10.1111/j.1365-294X.2009.04142.x |
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ftccsdartic:oai:HAL:halsde-00373273v1 2023-05-15T16:47:31+02:00 Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels Gagnaire, Pierre-Alexandre Albert, V. JÓnsson, B. Bernatchez, Louis 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) Institut de Biologie Intégrative et des Systèmes Québec (IBIS) Institute of Freshwater Fisheries, Institute of Fisheries 2009-04 https://hal.archives-ouvertes.fr/halsde-00373273 https://doi.org/10.1111/j.1365-294X.2009.04142.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-294X.2009.04142.x halsde-00373273 https://hal.archives-ouvertes.fr/halsde-00373273 doi:10.1111/j.1365-294X.2009.04142.x ISSN: 0962-1083 EISSN: 1365-294X Molecular Ecology https://hal.archives-ouvertes.fr/halsde-00373273 Molecular Ecology, Wiley, 2009, 18 (8), pp.1678 - 1691. ⟨10.1111/j.1365-294X.2009.04142.x⟩ AFLP Anguilla introgressive hybridization natural selection outlier loci species genetic barrier [SDE.BE.GP]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.gp info:eu-repo/semantics/article Journal articles 2009 ftccsdartic https://doi.org/10.1111/j.1365-294X.2009.04142.x 2021-11-21T04:59:05Z International audience Investigating patterns of genetic variation in hybridizing species provides an opportunity to understand the impact of natural selection on intraspecific genetic variability and interspecific gene exchange. The Atlantic eels Anguilla rostrata and A. anguilla each occupy a large heterogeneous habitat upon which natural selection could differentially shape genetic variation. They also produce viable hybrids only found in Iceland. However, the possible footprint of natural selection on patterns of genetic variation within species and introgressive hybridization in Icelandic eels has never been assessed. We revisited amplified fragment length polymorphism data collected previously using population genomics and admixture analyses to test if (i) genetic variation could be influenced by non-neutral mechanisms at both the intra- and interspecific levels, and if (ii) selection could shape the spatio-temporal distribution of Icelandic hybrids. We first found candidate loci for directional selection within both species. Spatial distributions of allelic frequencies displayed by some of these loci were possibly related with the geographical patterns of life-history traits in A. rostrata, and could have been shaped by natural selection associated with an environmental gradient along European coasts in A. anguilla. Second, we identified outlier loci at the interspecific level. Non-neutral introgression was strongly suggested for some of these loci. We detected a locus at which typical A. rostrata allele hardly crossed the species genetic barrier, whereas three other loci showed accelerated patterns of introgression into A. anguilla in Iceland. Moreover, the level of introgression at these three loci increased from the glass eel to the yellow eel stage, supporting the hypothesis that differential survival of admixed genotypes partly explains the spatio-temporal pattern of hybrid abundance previously documented in Iceland. Article in Journal/Newspaper Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Molecular Ecology 18 8 1678 1691 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
AFLP Anguilla introgressive hybridization natural selection outlier loci species genetic barrier [SDE.BE.GP]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.gp |
spellingShingle |
AFLP Anguilla introgressive hybridization natural selection outlier loci species genetic barrier [SDE.BE.GP]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.gp Gagnaire, Pierre-Alexandre Albert, V. JÓnsson, B. Bernatchez, Louis Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
topic_facet |
AFLP Anguilla introgressive hybridization natural selection outlier loci species genetic barrier [SDE.BE.GP]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.gp |
description |
International audience Investigating patterns of genetic variation in hybridizing species provides an opportunity to understand the impact of natural selection on intraspecific genetic variability and interspecific gene exchange. The Atlantic eels Anguilla rostrata and A. anguilla each occupy a large heterogeneous habitat upon which natural selection could differentially shape genetic variation. They also produce viable hybrids only found in Iceland. However, the possible footprint of natural selection on patterns of genetic variation within species and introgressive hybridization in Icelandic eels has never been assessed. We revisited amplified fragment length polymorphism data collected previously using population genomics and admixture analyses to test if (i) genetic variation could be influenced by non-neutral mechanisms at both the intra- and interspecific levels, and if (ii) selection could shape the spatio-temporal distribution of Icelandic hybrids. We first found candidate loci for directional selection within both species. Spatial distributions of allelic frequencies displayed by some of these loci were possibly related with the geographical patterns of life-history traits in A. rostrata, and could have been shaped by natural selection associated with an environmental gradient along European coasts in A. anguilla. Second, we identified outlier loci at the interspecific level. Non-neutral introgression was strongly suggested for some of these loci. We detected a locus at which typical A. rostrata allele hardly crossed the species genetic barrier, whereas three other loci showed accelerated patterns of introgression into A. anguilla in Iceland. Moreover, the level of introgression at these three loci increased from the glass eel to the yellow eel stage, supporting the hypothesis that differential survival of admixed genotypes partly explains the spatio-temporal pattern of hybrid abundance previously documented in Iceland. |
author2 |
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) Institut de Biologie Intégrative et des Systèmes Québec (IBIS) Institute of Freshwater Fisheries, Institute of Fisheries |
format |
Article in Journal/Newspaper |
author |
Gagnaire, Pierre-Alexandre Albert, V. JÓnsson, B. Bernatchez, Louis |
author_facet |
Gagnaire, Pierre-Alexandre Albert, V. JÓnsson, B. Bernatchez, Louis |
author_sort |
Gagnaire, Pierre-Alexandre |
title |
Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
title_short |
Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
title_full |
Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
title_fullStr |
Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
title_full_unstemmed |
Natural selection influences AFLP intraspecific genetic variability and introgression patterns in Atlantic eels |
title_sort |
natural selection influences aflp intraspecific genetic variability and introgression patterns in atlantic eels |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.archives-ouvertes.fr/halsde-00373273 https://doi.org/10.1111/j.1365-294X.2009.04142.x |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0962-1083 EISSN: 1365-294X Molecular Ecology https://hal.archives-ouvertes.fr/halsde-00373273 Molecular Ecology, Wiley, 2009, 18 (8), pp.1678 - 1691. ⟨10.1111/j.1365-294X.2009.04142.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-294X.2009.04142.x halsde-00373273 https://hal.archives-ouvertes.fr/halsde-00373273 doi:10.1111/j.1365-294X.2009.04142.x |
op_doi |
https://doi.org/10.1111/j.1365-294X.2009.04142.x |
container_title |
Molecular Ecology |
container_volume |
18 |
container_issue |
8 |
container_start_page |
1678 |
op_container_end_page |
1691 |
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1766037605766397952 |