Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale
Parallel speciation occurs when selection drives repeated, independent adaptive divergence that reduces gene flow between ecotypes. Classical examples show parallel speciation originating from shared genomic variation, but this does not seem to be the case in the rough periwinkle (Littorina saxatili...
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ftdryad:oai:v1.datadryad.org:10255/dryad.91204 2023-05-15T15:55:42+02:00 Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale Ravinet, Mark Westram, Anja Johannesson, Kerstin Butlin, Roger André, Carl Panova, Marina Stromstad Bohuslan Vastra Gotaland Sweden Western Europe 2015-07-23T14:05:25Z http://hdl.handle.net/10255/dryad.91204 https://doi.org/10.5061/dryad.g466r unknown doi:10.5061/dryad.g466r/1 doi:10.5061/dryad.g466r/2 doi:10.5061/dryad.g466r/3 doi:10.5061/dryad.g466r/4 doi:10.5061/dryad.g466r/5 doi:10.5061/dryad.g466r/6 doi:10.5061/dryad.g466r/7 doi:10.5061/dryad.g466r/8 doi:10.1111/mec.13332 PMID:26222268 doi:10.5061/dryad.g466r Ravinet M, Westram A, Johannesson K, Butlin R, André C, Panova M (2016) Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale. Molecular Ecology 25(1): 287–305. http://hdl.handle.net/10255/dryad.91204 Adaptation Genome scan RAD sequencing Parallel speciation null alleles shared genomic divergence Article 2015 ftdryad https://doi.org/10.5061/dryad.g466r https://doi.org/10.5061/dryad.g466r/1 https://doi.org/10.5061/dryad.g466r/2 https://doi.org/10.5061/dryad.g466r/3 https://doi.org/10.5061/dryad.g466r/4 https://doi.org/10.5061/dryad.g466r/5 https://doi.org/1 2020-01-01T15:21:33Z Parallel speciation occurs when selection drives repeated, independent adaptive divergence that reduces gene flow between ecotypes. Classical examples show parallel speciation originating from shared genomic variation, but this does not seem to be the case in the rough periwinkle (Littorina saxatilis) that has evolved considerable phenotypic diversity across Europe, including several distinct ecotypes. Small ‘wave’ ecotype snails inhabit exposed rocks and experience strong wave action, while thick-shelled, ‘crab’ ecotype snails are larger and experience crab predation on less exposed shores. Crab and wave ecotypes appear to have arisen in parallel and recent evidence suggests only marginal sharing of molecular variation linked to evolution of similar ecotypes in different parts of Europe. However the extent of genomic sharing is expected to increase with gene flow and more recent common ancestry. To test this we used de novo RAD-sequencing to quantify the extent of shared genomic divergence associated with phenotypic similarities among ecotype-pairs on three close islands (< 10 km distance) connected by weak gene flow (Nm~0.03) and with recent common ancestry (< 10,000 years). After accounting for technical issues, including a large proportion of null alleles due to a large effective population size, we found ~8-28% of positive outliers were shared between two islands and ~2-9% were shared among all three islands. This low level of sharing suggests that parallel phenotypic divergence in this system is not matched by shared genomic divergence despite a high probability of gene flow and standing genetic variation. Article in Journal/Newspaper Close Islands Dryad Digital Repository (Duke University) Close Islands ENVELOPE(144.550,144.550,-67.017,-67.017) |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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Adaptation Genome scan RAD sequencing Parallel speciation null alleles shared genomic divergence |
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Adaptation Genome scan RAD sequencing Parallel speciation null alleles shared genomic divergence Ravinet, Mark Westram, Anja Johannesson, Kerstin Butlin, Roger André, Carl Panova, Marina Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
topic_facet |
Adaptation Genome scan RAD sequencing Parallel speciation null alleles shared genomic divergence |
description |
Parallel speciation occurs when selection drives repeated, independent adaptive divergence that reduces gene flow between ecotypes. Classical examples show parallel speciation originating from shared genomic variation, but this does not seem to be the case in the rough periwinkle (Littorina saxatilis) that has evolved considerable phenotypic diversity across Europe, including several distinct ecotypes. Small ‘wave’ ecotype snails inhabit exposed rocks and experience strong wave action, while thick-shelled, ‘crab’ ecotype snails are larger and experience crab predation on less exposed shores. Crab and wave ecotypes appear to have arisen in parallel and recent evidence suggests only marginal sharing of molecular variation linked to evolution of similar ecotypes in different parts of Europe. However the extent of genomic sharing is expected to increase with gene flow and more recent common ancestry. To test this we used de novo RAD-sequencing to quantify the extent of shared genomic divergence associated with phenotypic similarities among ecotype-pairs on three close islands (< 10 km distance) connected by weak gene flow (Nm~0.03) and with recent common ancestry (< 10,000 years). After accounting for technical issues, including a large proportion of null alleles due to a large effective population size, we found ~8-28% of positive outliers were shared between two islands and ~2-9% were shared among all three islands. This low level of sharing suggests that parallel phenotypic divergence in this system is not matched by shared genomic divergence despite a high probability of gene flow and standing genetic variation. |
format |
Article in Journal/Newspaper |
author |
Ravinet, Mark Westram, Anja Johannesson, Kerstin Butlin, Roger André, Carl Panova, Marina |
author_facet |
Ravinet, Mark Westram, Anja Johannesson, Kerstin Butlin, Roger André, Carl Panova, Marina |
author_sort |
Ravinet, Mark |
title |
Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
title_short |
Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
title_full |
Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
title_fullStr |
Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
title_full_unstemmed |
Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale |
title_sort |
data from: shared and non-shared genomic divergence in parallel ecotypes of littorina saxatilis at a local scale |
publishDate |
2015 |
url |
http://hdl.handle.net/10255/dryad.91204 https://doi.org/10.5061/dryad.g466r |
op_coverage |
Stromstad Bohuslan Vastra Gotaland Sweden Western Europe |
long_lat |
ENVELOPE(144.550,144.550,-67.017,-67.017) |
geographic |
Close Islands |
geographic_facet |
Close Islands |
genre |
Close Islands |
genre_facet |
Close Islands |
op_relation |
doi:10.5061/dryad.g466r/1 doi:10.5061/dryad.g466r/2 doi:10.5061/dryad.g466r/3 doi:10.5061/dryad.g466r/4 doi:10.5061/dryad.g466r/5 doi:10.5061/dryad.g466r/6 doi:10.5061/dryad.g466r/7 doi:10.5061/dryad.g466r/8 doi:10.1111/mec.13332 PMID:26222268 doi:10.5061/dryad.g466r Ravinet M, Westram A, Johannesson K, Butlin R, André C, Panova M (2016) Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale. Molecular Ecology 25(1): 287–305. http://hdl.handle.net/10255/dryad.91204 |
op_doi |
https://doi.org/10.5061/dryad.g466r https://doi.org/10.5061/dryad.g466r/1 https://doi.org/10.5061/dryad.g466r/2 https://doi.org/10.5061/dryad.g466r/3 https://doi.org/10.5061/dryad.g466r/4 https://doi.org/10.5061/dryad.g466r/5 https://doi.org/1 |
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1766391185122787328 |