A genomic view of the peopling of the Americas. (December 2016)

• Record Type: Journal Article
• Authors: Skoglund, Pontus; Reich, David
• Is Part Of: Current opinion in genetics & development. Volume 41(2016)
• Page Start: 27
• Page End: 35
• Publication Date: 2016-12
• Subjects: Genetics -- Periodicals; Developmental biology -- Periodicals; Developmental genetics -- Periodicals; 576.5
• DOI: 10.1016/j.gde.2016.06.016
• Languages: English
• ISSNs: 0959-437X

Abstract

Abstract : Whole-genome studies have documented that most Native American ancestry stems from a single population that diversified within the continent more than twelve thousand years ago. However, this shared ancestry hides a more complex history whereby at least four distinct streams of Eurasian migration have contributed to present-day and prehistoric Native American populations. Whole genome studies enhanced by technological breakthroughs in ancient DNA now provide evidence of a sequence of events involving initial migrations from a structured Northeast Asian source population with differential relatedness to present-day Australasian populations, followed by a divergence into northern and southern Native American lineages. During the Holocene, new migrations from Asia introduced the Saqqaq/Dorset Paleoeskimo population to the North American Arctic ∼4500 years ago, ancestry that is potentially connected with ancestry found in Athabaskan-speakers today. This was then followed by a major new population turnover in the high Arctic involving Thule-related peoples who are the ancestors of present-day Inuit. We highlight several open questions that could be addressed through future genomic research.