Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon
Chromosomal inversions have been implicated in facilitating adaptation in the face of high levels of gene flow, but whether chromosomal fusions also have similar potential remains poorly understood. Atlantic salmon are usually characterized by population structure at multiple spatial scales; however...
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ftdryad:oai:v1.datadryad.org:10255/dryad.198829 2023-05-15T15:31:05+02:00 Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon Wellband, Kyle Mérot, Claire Linnansaari, Tommi Elliott, J. A. K. Curry, R. Allen Bernatchez, Louis 2018-11-20T10:09:14Z http://hdl.handle.net/10255/dryad.198829 https://doi.org/10.5061/dryad.8vj725t unknown doi:10.5061/dryad.8vj725t/1 doi:10.1111/mec.14965 doi:10.5061/dryad.8vj725t Wellband K, Mérot C, Linnansaari T, Elliott JAK, Curry RA, Bernatchez L (2019) Chromosomal fusion and life history‐associated genomic variation contribute to within‐river local adaptation of Atlantic salmon. Molecular Ecology 28(6): 1439-1459. http://hdl.handle.net/10255/dryad.198829 structural variation six6 Atlantic salmon chromosomal fusion local adaptation Article 2018 ftdryad https://doi.org/10.5061/dryad.8vj725t https://doi.org/10.5061/dryad.8vj725t/1 https://doi.org/10.1111/mec.14965 2020-01-01T16:19:18Z Chromosomal inversions have been implicated in facilitating adaptation in the face of high levels of gene flow, but whether chromosomal fusions also have similar potential remains poorly understood. Atlantic salmon are usually characterized by population structure at multiple spatial scales; however, this is not the case for tributaries of the Miramichi River in North America. To resolve genetic relationships between populations in this system and the potential for known chromosomal fusions to contribute to adaptation we genotyped 728 juvenile salmon using a 50K SNP array. Consistent with previous work, we report extremely weak overall population structuring (Global FST = 0.004) and failed to support hierarchical structure between the river’s two main branches. We provide the first genomic characterization of a previously described polymorphic fusion between chromosomes 8 and 29. Fusion genomic characteristics included high LD, reduced heterozygosity in the fused homokaryotes, and strong divergence between the fused and the unfused rearrangement. Population structure based on fusion karyotype was five times stronger than neutral variation (FST = 0.019) and the frequency of the fusion was associated with summer precipitation supporting a hypothesis that this rearrangement may contribute local adaptation despite weak neutral differentiation. Additionally, both outlier variation among populations and a polygenic framework for characterizing adaptive variation in relation to climate identified a 250 Kb region of chromosome 9, including the gene six6 that has previously been linked to age-at-maturity and run-timing for this species. Overall our results indicate that adaptive processes, independent of major river branching, are more important than neutral processes for structuring these populations. Article in Journal/Newspaper Atlantic salmon Dryad Digital Repository (Duke University) |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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ftdryad |
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unknown |
topic |
structural variation six6 Atlantic salmon chromosomal fusion local adaptation |
spellingShingle |
structural variation six6 Atlantic salmon chromosomal fusion local adaptation Wellband, Kyle Mérot, Claire Linnansaari, Tommi Elliott, J. A. K. Curry, R. Allen Bernatchez, Louis Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
topic_facet |
structural variation six6 Atlantic salmon chromosomal fusion local adaptation |
description |
Chromosomal inversions have been implicated in facilitating adaptation in the face of high levels of gene flow, but whether chromosomal fusions also have similar potential remains poorly understood. Atlantic salmon are usually characterized by population structure at multiple spatial scales; however, this is not the case for tributaries of the Miramichi River in North America. To resolve genetic relationships between populations in this system and the potential for known chromosomal fusions to contribute to adaptation we genotyped 728 juvenile salmon using a 50K SNP array. Consistent with previous work, we report extremely weak overall population structuring (Global FST = 0.004) and failed to support hierarchical structure between the river’s two main branches. We provide the first genomic characterization of a previously described polymorphic fusion between chromosomes 8 and 29. Fusion genomic characteristics included high LD, reduced heterozygosity in the fused homokaryotes, and strong divergence between the fused and the unfused rearrangement. Population structure based on fusion karyotype was five times stronger than neutral variation (FST = 0.019) and the frequency of the fusion was associated with summer precipitation supporting a hypothesis that this rearrangement may contribute local adaptation despite weak neutral differentiation. Additionally, both outlier variation among populations and a polygenic framework for characterizing adaptive variation in relation to climate identified a 250 Kb region of chromosome 9, including the gene six6 that has previously been linked to age-at-maturity and run-timing for this species. Overall our results indicate that adaptive processes, independent of major river branching, are more important than neutral processes for structuring these populations. |
format |
Article in Journal/Newspaper |
author |
Wellband, Kyle Mérot, Claire Linnansaari, Tommi Elliott, J. A. K. Curry, R. Allen Bernatchez, Louis |
author_facet |
Wellband, Kyle Mérot, Claire Linnansaari, Tommi Elliott, J. A. K. Curry, R. Allen Bernatchez, Louis |
author_sort |
Wellband, Kyle |
title |
Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
title_short |
Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
title_full |
Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
title_fullStr |
Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
title_full_unstemmed |
Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon |
title_sort |
data from: chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of atlantic salmon |
publishDate |
2018 |
url |
http://hdl.handle.net/10255/dryad.198829 https://doi.org/10.5061/dryad.8vj725t |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
doi:10.5061/dryad.8vj725t/1 doi:10.1111/mec.14965 doi:10.5061/dryad.8vj725t Wellband K, Mérot C, Linnansaari T, Elliott JAK, Curry RA, Bernatchez L (2019) Chromosomal fusion and life history‐associated genomic variation contribute to within‐river local adaptation of Atlantic salmon. Molecular Ecology 28(6): 1439-1459. http://hdl.handle.net/10255/dryad.198829 |
op_doi |
https://doi.org/10.5061/dryad.8vj725t https://doi.org/10.5061/dryad.8vj725t/1 https://doi.org/10.1111/mec.14965 |
_version_ |
1766361571940892672 |