Reconstructing Native American population history

The peopling of the Americas has been the subject of extensive genetic, archaeological and linguistic research; however, central questions remain unresolved. One contentious issue is whether the settlement occurred by means of a single migration or multiple streams of migration from Siberia. The pat...

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Detalles Bibliográficos
Autores: Reich, David, Patterson, Nick, Campbell, Desmond, Tandon, Arti, Mazieres, Stéphane, Ray, Nicolas, Parra, Maria V., Rojas, Winston, Duque, Constanza, Mesa, Natalia, García, Luis F., Triana, Omar, Blair, Silvia, Maestre, Amanda, Dib, Juan C., Bravi, Claudio Marcelo, Bailliet, Graciela, Corach, Daniel, Hünemeier, Tábita, Bortolini, Maria Cátira, Salzano, Francisco M., Petzl Erler, María Luiza, Acuña Alonzo, Victor, Aguilar Salinas, Carlos, Canizales-Quinteros, Samuel, Tusié Luna, Teresa, Riba, Laura, Rodríguez Cruz, Maricela, Lopez Alarcón, Mardia, Coral Vazquez, Ramón
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/125341
Acceso en línea:http://hdl.handle.net/11336/125341
Access Level:acceso abierto
Palabra clave:Native American
Snp
Ancestry
Admixture
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
Descripción
Sumario:The peopling of the Americas has been the subject of extensive genetic, archaeological and linguistic research; however, central questions remain unresolved. One contentious issue is whether the settlement occurred by means of a single migration or multiple streams of migration from Siberia. The pattern of dispersals within the Americas is also poorly understood. To address these questions at a higher resolution than was previously possible, we assembled data from 52 Native American and 17 Siberian groups genotyped at 364,470 single nucleotide polymorphisms. Here we show that Native Americans descend from at least three streams of Asian gene flow. Most descend entirely from a single ancestral population that we call First American. However, speakers of Eskimog-Aleut languages from the Arctic inherit almost half their ancestry from a second stream of Asian gene flow, and the Na-Dene-speaking Chipewyan from Canada inherit roughly one-tenth of their ancestry from a third stream. We show that the initial peopling followed a southward expansion facilitated by the coast, with sequential population splits and little gene flow after divergence, especially in South America. A major exception is in Chibchan speakers on both sides of the Panama isthmus, who have ancestry from both North and South America. © 2012 Macmillan Publishers Limited. All rights reserved.

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