Do North Atlantic eels show parallel patterns of spatially varying selection?
Abstract Background The two North Atlantic eel species, the European and the American eel, represent an ideal system in which to study parallel selection patterns due to their sister species status and the presence of ongoing gene flow. A panel of 80 coding-gene SNPs previously analyzed in American...
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ftbiomed:oai:biomedcentral.com:1471-2148-14-138 2023-05-15T16:08:36+02:00 Do North Atlantic eels show parallel patterns of spatially varying selection? Ulrik, Malene G Pujolar, José Ferchaud, Anne-Laure Jacobsen, Magnus W Als, Thomas D Gagnaire, Pierre Frydenberg, Jane Bøcher, Peder K Jónsson, Bjarni Bernatchez, Louis Hansen, Michael M 2014-06-20 http://www.biomedcentral.com/1471-2148/14/138 en eng BioMed Central Ltd. http://www.biomedcentral.com/1471-2148/14/138 Copyright 2014 Ulrik et al.; licensee BioMed Central Ltd. Adaptation European eel Genetic-by-environment associations Parallel selection Single nucleotide polymorphisms Research article 2014 ftbiomed 2014-06-29T00:32:03Z Abstract Background The two North Atlantic eel species, the European and the American eel, represent an ideal system in which to study parallel selection patterns due to their sister species status and the presence of ongoing gene flow. A panel of 80 coding-gene SNPs previously analyzed in American eel was used to genotype European eel individuals (glass eels) from 8 sampling locations across the species distribution. We tested for single-generation signatures of spatially varying selection in European eel by searching for elevated genetic differentiation using F ST -based outlier tests and by testing for significant associations between allele frequencies and environmental variables. Results We found signatures of possible selection at a total of 11 coding-gene SNPs. Candidate genes for local selection constituted mainly genes with a major role in metabolism as well as defense genes. Contrary to what has been found for American eel, only 2 SNPs in our study correlated with differences in temperature, which suggests that other explanatory variables may play a role. None of the genes found to be associated with explanatory variables in European eel showed any correlations with environmental factors in the previous study in American eel. Conclusions The different signatures of selection between species could be due to distinct selective pressures associated with the much longer larval migration for European eel relative to American eel. The lack of parallel selection in North Atlantic eels could also be due to most phenotypic traits being polygenic, thus reducing the likelihood of selection acting on the same genes in both species. Article in Journal/Newspaper European eel North Atlantic BioMed Central |
institution |
Open Polar |
collection |
BioMed Central |
op_collection_id |
ftbiomed |
language |
English |
topic |
Adaptation European eel Genetic-by-environment associations Parallel selection Single nucleotide polymorphisms |
spellingShingle |
Adaptation European eel Genetic-by-environment associations Parallel selection Single nucleotide polymorphisms Ulrik, Malene G Pujolar, José Ferchaud, Anne-Laure Jacobsen, Magnus W Als, Thomas D Gagnaire, Pierre Frydenberg, Jane Bøcher, Peder K Jónsson, Bjarni Bernatchez, Louis Hansen, Michael M Do North Atlantic eels show parallel patterns of spatially varying selection? |
topic_facet |
Adaptation European eel Genetic-by-environment associations Parallel selection Single nucleotide polymorphisms |
description |
Abstract Background The two North Atlantic eel species, the European and the American eel, represent an ideal system in which to study parallel selection patterns due to their sister species status and the presence of ongoing gene flow. A panel of 80 coding-gene SNPs previously analyzed in American eel was used to genotype European eel individuals (glass eels) from 8 sampling locations across the species distribution. We tested for single-generation signatures of spatially varying selection in European eel by searching for elevated genetic differentiation using F ST -based outlier tests and by testing for significant associations between allele frequencies and environmental variables. Results We found signatures of possible selection at a total of 11 coding-gene SNPs. Candidate genes for local selection constituted mainly genes with a major role in metabolism as well as defense genes. Contrary to what has been found for American eel, only 2 SNPs in our study correlated with differences in temperature, which suggests that other explanatory variables may play a role. None of the genes found to be associated with explanatory variables in European eel showed any correlations with environmental factors in the previous study in American eel. Conclusions The different signatures of selection between species could be due to distinct selective pressures associated with the much longer larval migration for European eel relative to American eel. The lack of parallel selection in North Atlantic eels could also be due to most phenotypic traits being polygenic, thus reducing the likelihood of selection acting on the same genes in both species. |
format |
Article in Journal/Newspaper |
author |
Ulrik, Malene G Pujolar, José Ferchaud, Anne-Laure Jacobsen, Magnus W Als, Thomas D Gagnaire, Pierre Frydenberg, Jane Bøcher, Peder K Jónsson, Bjarni Bernatchez, Louis Hansen, Michael M |
author_facet |
Ulrik, Malene G Pujolar, José Ferchaud, Anne-Laure Jacobsen, Magnus W Als, Thomas D Gagnaire, Pierre Frydenberg, Jane Bøcher, Peder K Jónsson, Bjarni Bernatchez, Louis Hansen, Michael M |
author_sort |
Ulrik, Malene G |
title |
Do North Atlantic eels show parallel patterns of spatially varying selection? |
title_short |
Do North Atlantic eels show parallel patterns of spatially varying selection? |
title_full |
Do North Atlantic eels show parallel patterns of spatially varying selection? |
title_fullStr |
Do North Atlantic eels show parallel patterns of spatially varying selection? |
title_full_unstemmed |
Do North Atlantic eels show parallel patterns of spatially varying selection? |
title_sort |
do north atlantic eels show parallel patterns of spatially varying selection? |
publisher |
BioMed Central Ltd. |
publishDate |
2014 |
url |
http://www.biomedcentral.com/1471-2148/14/138 |
genre |
European eel North Atlantic |
genre_facet |
European eel North Atlantic |
op_relation |
http://www.biomedcentral.com/1471-2148/14/138 |
op_rights |
Copyright 2014 Ulrik et al.; licensee BioMed Central Ltd. |
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1766404637934485504 |