User talk:Radiolarion
Genetics and Archaeogenetics of South Asia (Message for BashBrannigan)[edit]
Hi BashBrannigan
After reading the paper by Reich et al (Nature 2009), it was not clear to me whether Ancestral North Indians (ANI) and Ancestral South Indians (ASI) existed in India around 40,000 years ago. It will be great if you can pinpoint where exactly they say that.
My understanding is that they do not give time frames for when ANI split from CEU (HapMap population of Eastern Europeans from Utah) and when ASI split from the Onge, and also, when ANI and ASI mixed. The closest I came to find timelines for these events are in the Supplementary Information, Page 40, when they assume some number of generations for the purpose of coalescent simulations in order to support their new method of Regression Ancestry Estimation. But these time frames are assumed and not proven, and hence should not be quoted. Moreover, in the discussion section in the main paper, their future works are to estimate the time frames for the admixture between ANI and ASI, and for the splits of ANI and ASI from CEU and Onge respectively.
Thus it seems that the time frames for the existence of ANI and ASI are not clearly understood. Radiolarion (talk) 07:29, 13 January 2011 (UTC)