Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod
The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by...
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ftoslouniv:oai:www.duo.uio.no:10852/67921 2023-05-15T15:27:18+02:00 Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor 2018-10-15T08:35:36Z http://hdl.handle.net/10852/67921 http://urn.nb.no/URN:NBN:no-71082 https://doi.org/10.1002/ece3.4648 EN eng NFR/21610 http://urn.nb.no/URN:NBN:no-71082 Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor . Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod. Ecology and Evolution. 2018, 8, 12547-12558 http://hdl.handle.net/10852/67921 1620282 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology and Evolution&rft.volume=8&rft.spage=12547&rft.date=2018 Ecology and Evolution 8 12547 12558 http://dx.doi.org/10.1002/ece3.4648 URN:NBN:no-71082 Fulltext https://www.duo.uio.no/bitstream/handle/10852/67921/2/jorde_et_al_2018c.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2045-7758 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2018 ftoslouniv https://doi.org/10.1002/ece3.4648 2020-06-21T08:53:06Z The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by weak population structure at neutral loci. Highly fecund species may tolerate the cost of strong selective mortality during early life stages, potentially leading to a shift in offspring genotypes away from the parental proportions. In Atlantic cod, recent genetic studies have uncovered different genotype clusters apparently representing phenotypically cryptic populations that coexist in coastal waters. Here, we tested if a high‐graded SNP panel specifically designed to classify individual cod to population of origin may be unreliable because of natural selection acting on the SNPs or their linked background. Temporal samples of cod were collected from two fjords, starting at the earliest life stage (pelagic eggs) and carried on until late autumn (bottom‐settled juveniles), covering the period during summer of high natural mortality. Despite the potential for selective mortality during the study period, we found no evidence for selection, as both cod types occurred throughout the season, already in the earliest egg samples, and there was no evidence for a shift during the season in the proportions of one or the other type. We conclude that high‐graded marker panels under putative natural selection represent a valid and useful tool for identifying biological population structure in this highly fecund species and presumably in others. Article in Journal/Newspaper atlantic cod Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Ecology and Evolution 8 24 12547 12558 |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by weak population structure at neutral loci. Highly fecund species may tolerate the cost of strong selective mortality during early life stages, potentially leading to a shift in offspring genotypes away from the parental proportions. In Atlantic cod, recent genetic studies have uncovered different genotype clusters apparently representing phenotypically cryptic populations that coexist in coastal waters. Here, we tested if a high‐graded SNP panel specifically designed to classify individual cod to population of origin may be unreliable because of natural selection acting on the SNPs or their linked background. Temporal samples of cod were collected from two fjords, starting at the earliest life stage (pelagic eggs) and carried on until late autumn (bottom‐settled juveniles), covering the period during summer of high natural mortality. Despite the potential for selective mortality during the study period, we found no evidence for selection, as both cod types occurred throughout the season, already in the earliest egg samples, and there was no evidence for a shift during the season in the proportions of one or the other type. We conclude that high‐graded marker panels under putative natural selection represent a valid and useful tool for identifying biological population structure in this highly fecund species and presumably in others. |
format |
Article in Journal/Newspaper |
author |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor |
spellingShingle |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
author_facet |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor |
author_sort |
Jorde, Per Erik |
title |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_short |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_full |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_fullStr |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_full_unstemmed |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_sort |
can we rely on selected genetic markers for population identification? evidence from coastal atlantic cod |
publishDate |
2018 |
url |
http://hdl.handle.net/10852/67921 http://urn.nb.no/URN:NBN:no-71082 https://doi.org/10.1002/ece3.4648 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
2045-7758 |
op_relation |
NFR/21610 http://urn.nb.no/URN:NBN:no-71082 Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor . Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod. Ecology and Evolution. 2018, 8, 12547-12558 http://hdl.handle.net/10852/67921 1620282 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology and Evolution&rft.volume=8&rft.spage=12547&rft.date=2018 Ecology and Evolution 8 12547 12558 http://dx.doi.org/10.1002/ece3.4648 URN:NBN:no-71082 Fulltext https://www.duo.uio.no/bitstream/handle/10852/67921/2/jorde_et_al_2018c.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.4648 |
container_title |
Ecology and Evolution |
container_volume |
8 |
container_issue |
24 |
container_start_page |
12547 |
op_container_end_page |
12558 |
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1766357756466429952 |