Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow
Reconstructing the evolution of baleen whales (Mysticeti) has been problematic because morphological and genetic analyses have produced different scenarios. This might be caused by genomic admixture that May have taken place among some rorquals. We present the genomes of six whales, including the bl...
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American Association for the Advancement of Science (AAAS)
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Online Access: | https://lup.lub.lu.se/record/e9bd9924-fed7-4493-8722-c3a1233566a5 https://doi.org/10.1126/sciadv.aap9873 |
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ftulundlup:oai:lup.lub.lu.se:e9bd9924-fed7-4493-8722-c3a1233566a5 2024-05-19T07:37:58+00:00 Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow Árnason, Úlfur Lammers, Fritjof Kumar, Vikas Nilsson, Maria A. Janke, Axel 2018-04-04 https://lup.lub.lu.se/record/e9bd9924-fed7-4493-8722-c3a1233566a5 https://doi.org/10.1126/sciadv.aap9873 eng eng American Association for the Advancement of Science (AAAS) https://lup.lub.lu.se/record/e9bd9924-fed7-4493-8722-c3a1233566a5 http://dx.doi.org/10.1126/sciadv.aap9873 pmid:29632892 scopus:85045028411 Science Advances; 4(4), no Y (2018) ISSN: 2375-2548 Evolutionary Biology contributiontojournal/article info:eu-repo/semantics/article text 2018 ftulundlup https://doi.org/10.1126/sciadv.aap9873 2024-04-30T23:32:16Z Reconstructing the evolution of baleen whales (Mysticeti) has been problematic because morphological and genetic analyses have produced different scenarios. This might be caused by genomic admixture that May have taken place among some rorquals. We present the genomes of six whales, including the blue whale (Balaenoptera musculus), to reconstruct a species tree of baleen whales and to identify phylogenetic conflicts. Evolutionary multilocus analyses of 34,192 genome fragments reveal a fast radiation of rorquals at 10.5 to 7.5 million years ago coinciding with oceanic circulation shifts. The evolutionarily enigmatic gray whale (Eschrichtius robustus) is placed among rorquals, and the blue whale genome shows a high degree of heterozygosity. The nearly equal frequency of conflicting gene trees suggests that speciation of rorqual evolution occurred under gene flow, which is best depicted by evolutionary networks. Especially in marine environments, sympatric speciation might be common; our results raise questions about how genetic divergence can be established. Article in Journal/Newspaper Balaenoptera musculus baleen whales Blue whale Lund University Publications (LUP) Science Advances 4 4 eaap9873 |
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Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Evolutionary Biology |
spellingShingle |
Evolutionary Biology Árnason, Úlfur Lammers, Fritjof Kumar, Vikas Nilsson, Maria A. Janke, Axel Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
topic_facet |
Evolutionary Biology |
description |
Reconstructing the evolution of baleen whales (Mysticeti) has been problematic because morphological and genetic analyses have produced different scenarios. This might be caused by genomic admixture that May have taken place among some rorquals. We present the genomes of six whales, including the blue whale (Balaenoptera musculus), to reconstruct a species tree of baleen whales and to identify phylogenetic conflicts. Evolutionary multilocus analyses of 34,192 genome fragments reveal a fast radiation of rorquals at 10.5 to 7.5 million years ago coinciding with oceanic circulation shifts. The evolutionarily enigmatic gray whale (Eschrichtius robustus) is placed among rorquals, and the blue whale genome shows a high degree of heterozygosity. The nearly equal frequency of conflicting gene trees suggests that speciation of rorqual evolution occurred under gene flow, which is best depicted by evolutionary networks. Especially in marine environments, sympatric speciation might be common; our results raise questions about how genetic divergence can be established. |
format |
Article in Journal/Newspaper |
author |
Árnason, Úlfur Lammers, Fritjof Kumar, Vikas Nilsson, Maria A. Janke, Axel |
author_facet |
Árnason, Úlfur Lammers, Fritjof Kumar, Vikas Nilsson, Maria A. Janke, Axel |
author_sort |
Árnason, Úlfur |
title |
Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
title_short |
Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
title_full |
Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
title_fullStr |
Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
title_full_unstemmed |
Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
title_sort |
whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2018 |
url |
https://lup.lub.lu.se/record/e9bd9924-fed7-4493-8722-c3a1233566a5 https://doi.org/10.1126/sciadv.aap9873 |
genre |
Balaenoptera musculus baleen whales Blue whale |
genre_facet |
Balaenoptera musculus baleen whales Blue whale |
op_source |
Science Advances; 4(4), no Y (2018) ISSN: 2375-2548 |
op_relation |
https://lup.lub.lu.se/record/e9bd9924-fed7-4493-8722-c3a1233566a5 http://dx.doi.org/10.1126/sciadv.aap9873 pmid:29632892 scopus:85045028411 |
op_doi |
https://doi.org/10.1126/sciadv.aap9873 |
container_title |
Science Advances |
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4 |
container_issue |
4 |
container_start_page |
eaap9873 |
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1799477368777080832 |