A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/24138 |
Resumo: | The Americas were the last continents to be populated by humans, and their colonization represents a very interesting chapter in our species’ evolution in which important issues are still contentious or largely unknown. One difficult topic concerns the details of the early peopling of Beringia, such as for how long it was colonized before people moved into the Americas and the demography of this occupation. A recent work using mitochondrial genome (mtDNA) data presented evidence for a so called ‘‘three-stage model’’ consisting of a very early expansion into Beringia followed by ,20,000 years of population stability before the final entry into the Americas. However, these results are in disagreement with other recent studies using similar data and methods. Here, we reanalyze their data to check the robustness of this model and test the ability of Native American mtDNA to discriminate details of the early colonization of Beringia. We apply the Bayesian Skyline Plot approach to recover the past demographic dynamic underpinning these events using different mtDNA data sets. Our results refute the specific details of the ‘‘three-stage model’’, since the early stage of expansion into Beringia followed by a long period of stasis could not be reproduced in any mtDNA data set cleaned from non-Native American haplotypes. Nevertheless, they are consistent with a moderate population bottleneck in Beringia associated with the Last Glacial Maximum followed by a strong population growth around 18,000 years ago as suggested by other recent studies. We suggest that this bottleneck erased the signals of ancient demographic history from recent Native American mtDNA pool, and conclude that the proposed early expansion and occupation of Beringia is an artifact caused by the misincorporation of non-Native American haplotypes. |
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Fagundes, Nelson Jurandi RosaKanitz, RicardoBonatto, Sandro Luis2010-06-25T04:18:56Z20081932-6203http://hdl.handle.net/10183/24138000742034The Americas were the last continents to be populated by humans, and their colonization represents a very interesting chapter in our species’ evolution in which important issues are still contentious or largely unknown. One difficult topic concerns the details of the early peopling of Beringia, such as for how long it was colonized before people moved into the Americas and the demography of this occupation. A recent work using mitochondrial genome (mtDNA) data presented evidence for a so called ‘‘three-stage model’’ consisting of a very early expansion into Beringia followed by ,20,000 years of population stability before the final entry into the Americas. However, these results are in disagreement with other recent studies using similar data and methods. Here, we reanalyze their data to check the robustness of this model and test the ability of Native American mtDNA to discriminate details of the early colonization of Beringia. We apply the Bayesian Skyline Plot approach to recover the past demographic dynamic underpinning these events using different mtDNA data sets. Our results refute the specific details of the ‘‘three-stage model’’, since the early stage of expansion into Beringia followed by a long period of stasis could not be reproduced in any mtDNA data set cleaned from non-Native American haplotypes. Nevertheless, they are consistent with a moderate population bottleneck in Beringia associated with the Last Glacial Maximum followed by a strong population growth around 18,000 years ago as suggested by other recent studies. We suggest that this bottleneck erased the signals of ancient demographic history from recent Native American mtDNA pool, and conclude that the proposed early expansion and occupation of Beringia is an artifact caused by the misincorporation of non-Native American haplotypes.application/pdfengPLoS ONE. San Francisco. Vol. 3, no. 9 (Sept. 2008), e3157, 5 p.Evolução humanaDNA mitocondrialA reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of BeringiaEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000742034.pdf000742034.pdfTexto completo (inglês)application/pdf222931http://www.lume.ufrgs.br/bitstream/10183/24138/1/000742034.pdf87420c704155d080626aafa0639f43a1MD51TEXT000742034.pdf.txt000742034.pdf.txtExtracted Texttext/plain28081http://www.lume.ufrgs.br/bitstream/10183/24138/2/000742034.pdf.txt5c5f7b9ae711605dde9f7b79c39eb799MD52THUMBNAIL000742034.pdf.jpg000742034.pdf.jpgGenerated Thumbnailimage/jpeg2073http://www.lume.ufrgs.br/bitstream/10183/24138/3/000742034.pdf.jpg0ea7770738d0d512e6f3e4c70b4a76dfMD5310183/241382023-09-23 03:33:53.72799oai:www.lume.ufrgs.br:10183/24138Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-23T06:33:53Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
title |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
spellingShingle |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia Fagundes, Nelson Jurandi Rosa Evolução humana DNA mitocondrial |
title_short |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
title_full |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
title_fullStr |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
title_full_unstemmed |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
title_sort |
A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia |
author |
Fagundes, Nelson Jurandi Rosa |
author_facet |
Fagundes, Nelson Jurandi Rosa Kanitz, Ricardo Bonatto, Sandro Luis |
author_role |
author |
author2 |
Kanitz, Ricardo Bonatto, Sandro Luis |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fagundes, Nelson Jurandi Rosa Kanitz, Ricardo Bonatto, Sandro Luis |
dc.subject.por.fl_str_mv |
Evolução humana DNA mitocondrial |
topic |
Evolução humana DNA mitocondrial |
description |
The Americas were the last continents to be populated by humans, and their colonization represents a very interesting chapter in our species’ evolution in which important issues are still contentious or largely unknown. One difficult topic concerns the details of the early peopling of Beringia, such as for how long it was colonized before people moved into the Americas and the demography of this occupation. A recent work using mitochondrial genome (mtDNA) data presented evidence for a so called ‘‘three-stage model’’ consisting of a very early expansion into Beringia followed by ,20,000 years of population stability before the final entry into the Americas. However, these results are in disagreement with other recent studies using similar data and methods. Here, we reanalyze their data to check the robustness of this model and test the ability of Native American mtDNA to discriminate details of the early colonization of Beringia. We apply the Bayesian Skyline Plot approach to recover the past demographic dynamic underpinning these events using different mtDNA data sets. Our results refute the specific details of the ‘‘three-stage model’’, since the early stage of expansion into Beringia followed by a long period of stasis could not be reproduced in any mtDNA data set cleaned from non-Native American haplotypes. Nevertheless, they are consistent with a moderate population bottleneck in Beringia associated with the Last Glacial Maximum followed by a strong population growth around 18,000 years ago as suggested by other recent studies. We suggest that this bottleneck erased the signals of ancient demographic history from recent Native American mtDNA pool, and conclude that the proposed early expansion and occupation of Beringia is an artifact caused by the misincorporation of non-Native American haplotypes. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008 |
dc.date.accessioned.fl_str_mv |
2010-06-25T04:18:56Z |
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000742034 |
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http://hdl.handle.net/10183/24138 |
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PLoS ONE. San Francisco. Vol. 3, no. 9 (Sept. 2008), e3157, 5 p. |
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info:eu-repo/semantics/openAccess |
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