Monday, April 17, 2017

Divergence Times for Native American vs Siberian Populations

Genomic evidence for the Pleistocene and recent population history of Native Americans
Raghavan et al.
July 21, 2015

Supplemental Data Section S7. Timing early Native American migrations (present-day samples) 
Method I: diCal (Demographic Inference using Composite Approximate Likelihood) Analysis 
Method: “Paul and Song (158) developed a principled approach based on the Wright-Fisher diffusion process with recombination to derive improved CSDs directly from the underlying population genetics model.”

Figure S15, shows that all Amerindians (including Athabascan speakers) split from Siberian groups, in this case Koryaks and Nivkhs, approximately 20,000 years ago (with the earliest divergence occurring at approximately 26,000 years ago, and the most recent possible limit on the split occurring approximately 16,000 years ago.) This method suggests a soft split between Siberian and Amerindian groups, starting approximately 26,000 years ago, and continuing over a long time frame of approximately 10,000 years.  The split is statistically complete at approximately 16,000 years ago.

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