Two Basal Models for Eurasian Population History

ren
Advanced Member
ren
Advanced Member
Joined: January 2nd, 2005, 3:35 am

May 26th, 2018, 11:04 am #1

Dai can't be used as a baseline to calculate EA admixture into ANE or vice versa:

The bestmodel for present-day Dai
populations is a mixture of group 2 individuals and
a pulse of admixture from East Asians (fig. S39).
-main paper, "The prehistoric peopling of Southeast Asia"

p. 55 of supplement:
La364 is best modeled as a mixture of a sister group to La368 (Group 1) and an East Asian component (related to Amis). In turn, present-day Dai is best modeled as a mixture of a sister group to La364 (Group 2) and an additional East Asian component (worst-fitting Z = 3.66).

Model 1: 0 ghost populations, 2 hypothetical admixture events
1. Eurasian branching into only West Eurasian and East Eurasian (ENA), with no necessity for Basal Eurasian because
2. Ust-Ishim (assumed as Early E. Eurasian) and Tianyuan mix, can't represent one phenomenon because Tianyuan doesn't share much drift with Ust-Ishim
3. Resultant population mixes into West Eurasian

Model 2: 1 ghost population, 2 hypothetical admixture events
1. Eurasian branching into Basal and Crown Eurasian first,
2. Then Crown breaks into East and West
3. Basal admixes into West
4a. Another Ghost population admixes into both Goyet and Tianyuan (unnecessary because East Asian statistically appears to be an admixture of Tianyuan with Hoabinhian)
4b. Tianyuan admixes into Goyet-116

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