Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands
Reticulated evolution -i.e. secondary introgression/admixture between sister taxa- is increasingly recognized as playing a key role in structuring infra-specific genetic variation and revealing cryptic genetic connectivity patterns. When admixture zones coincide with ecological transitions, the conn...
Main Authors: | , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://zenodo.org/record/1489682 https://doi.org/10.1101/239244 |
id |
ftzenodo:oai:zenodo.org:1489682 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:1489682 2023-05-15T17:02:04+02:00 Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands Fraisse, Christelle Haguenauer, Anne Gerard, Karin Anh-Thu Weber, Alexandra Bierne, Nicolas Chenuil, Anne 2018-10-24 https://zenodo.org/record/1489682 https://doi.org/10.1101/239244 eng eng doi:10.5061/dryad.6k740 https://zenodo.org/communities/peer_community_in https://zenodo.org/record/1489682 https://doi.org/10.1101/239244 oai:zenodo.org:1489682 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode Mytilus mussels Fine-grained connectivity Admixture Introgression Genetic - environment association info:eu-repo/semantics/preprint publication-preprint 2018 ftzenodo https://doi.org/10.1101/23924410.5061/dryad.6k740 2023-03-10T23:01:19Z Reticulated evolution -i.e. secondary introgression/admixture between sister taxa- is increasingly recognized as playing a key role in structuring infra-specific genetic variation and revealing cryptic genetic connectivity patterns. When admixture zones coincide with ecological transitions, the connectivity patterns often follow environmental variations better than distance and introgression clines may easily be confounded with local adaptation signatures. The Kerguelen mussels is an ideal system to investigate the potential role of admixture in enhancing micro-geographic structure, as they inhabit a small isolated island in the Southern Ocean characterized by a highly heterogeneous environment. Furthermore, genomic reticulation between Northern species (M. edulis, M. galloprovincialis and M. trossulus) and Southern species (M. platensis: South America and the Kerguelen Islands; and M. planulatus: Australasia) has been suspected. Here, we extended a previous analysis by using targeted-sequencing data (51,878 SNPs) across the three Northern species and the Kerguelen population. Spatial structure in the Kerguelen was then analyzed with a panel of 33 SNPs, including SNPs that were more differentiated than the genomic average between Northern species (i.e., ancestry-informative SNPs). We first showed that the Kerguelen lineage splitted very shortly after M. edulis and M. galloprovincialis initiated speciation, and it subsequently experienced admixture with the three Northern taxa. We then demonstrated that the Kerguelen mussels were significantly differentiated over small spatial distance, and that this local genetic structure was associated with environmental variations and mostly revealed by ancestry-informative markers. Simulations of admixture in the island highlight that genetic-environment associations can be better explained by introgression clines between heterogeneously differentiated genomes than by adaptation. A preprint peer-reviewed and recommended by Peer Community in Evolutionary Biology. ... Report Kerguelen Islands Southern Ocean Zenodo Kerguelen Kerguelen Islands Southern Ocean |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
English |
topic |
Mytilus mussels Fine-grained connectivity Admixture Introgression Genetic - environment association |
spellingShingle |
Mytilus mussels Fine-grained connectivity Admixture Introgression Genetic - environment association Fraisse, Christelle Haguenauer, Anne Gerard, Karin Anh-Thu Weber, Alexandra Bierne, Nicolas Chenuil, Anne Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
topic_facet |
Mytilus mussels Fine-grained connectivity Admixture Introgression Genetic - environment association |
description |
Reticulated evolution -i.e. secondary introgression/admixture between sister taxa- is increasingly recognized as playing a key role in structuring infra-specific genetic variation and revealing cryptic genetic connectivity patterns. When admixture zones coincide with ecological transitions, the connectivity patterns often follow environmental variations better than distance and introgression clines may easily be confounded with local adaptation signatures. The Kerguelen mussels is an ideal system to investigate the potential role of admixture in enhancing micro-geographic structure, as they inhabit a small isolated island in the Southern Ocean characterized by a highly heterogeneous environment. Furthermore, genomic reticulation between Northern species (M. edulis, M. galloprovincialis and M. trossulus) and Southern species (M. platensis: South America and the Kerguelen Islands; and M. planulatus: Australasia) has been suspected. Here, we extended a previous analysis by using targeted-sequencing data (51,878 SNPs) across the three Northern species and the Kerguelen population. Spatial structure in the Kerguelen was then analyzed with a panel of 33 SNPs, including SNPs that were more differentiated than the genomic average between Northern species (i.e., ancestry-informative SNPs). We first showed that the Kerguelen lineage splitted very shortly after M. edulis and M. galloprovincialis initiated speciation, and it subsequently experienced admixture with the three Northern taxa. We then demonstrated that the Kerguelen mussels were significantly differentiated over small spatial distance, and that this local genetic structure was associated with environmental variations and mostly revealed by ancestry-informative markers. Simulations of admixture in the island highlight that genetic-environment associations can be better explained by introgression clines between heterogeneously differentiated genomes than by adaptation. A preprint peer-reviewed and recommended by Peer Community in Evolutionary Biology. ... |
format |
Report |
author |
Fraisse, Christelle Haguenauer, Anne Gerard, Karin Anh-Thu Weber, Alexandra Bierne, Nicolas Chenuil, Anne |
author_facet |
Fraisse, Christelle Haguenauer, Anne Gerard, Karin Anh-Thu Weber, Alexandra Bierne, Nicolas Chenuil, Anne |
author_sort |
Fraisse, Christelle |
title |
Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
title_short |
Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
title_full |
Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
title_fullStr |
Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
title_full_unstemmed |
Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands |
title_sort |
fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated kerguelen islands |
publishDate |
2018 |
url |
https://zenodo.org/record/1489682 https://doi.org/10.1101/239244 |
geographic |
Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_relation |
doi:10.5061/dryad.6k740 https://zenodo.org/communities/peer_community_in https://zenodo.org/record/1489682 https://doi.org/10.1101/239244 oai:zenodo.org:1489682 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode |
op_doi |
https://doi.org/10.1101/23924410.5061/dryad.6k740 |
_version_ |
1766055296379125760 |