I want to make a quick post on a new article by Nezih Seven. You can find it here.
A Genetic Analysis of Historical Population Movements Around The Zagros Mountains
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| Model for Hasanlu_LBA_A by Nezih |
In this article, I will lay out general ancestry trends of 150+ groups from the Indian subcontinent. And try to make it make sense to a lay audience.
1. The purpose of the table is to concurrently compare the ancestry trends for 100+ groups of the Indian subcontinent. If the chosen sources are incorrect, they will be incorrect for all the groups but will still allow us to compare ancestry % across groups and make some conclusions. The fit (distance %) is not too relevant, and the distances of some groups will indeed be bad (>3%). However, that does not take away from our purpose of finding broad trends within the data.
As per the Harvard database, there are 454 male samples dated between 3000BCE and 0CE in all the *stan countries north of India and Russia combined. Of these, 166 are R1a but none is R1a-Y2 or L657+ which is supposed to have been formed around 2600BCE from Steppe R1a-Z94 > Y3.
In Narasimhan et al 2019 supplement too, there are 250 male samples analyzed between the dates 3000BCE - 0 CE, and none of them is R1a-Y3+. These include all the Sintashta, Andronovo, Saka and descended culture samples, all of these have significant steppe_mlba admixture.
This is the modern country-wise frequency of R-Y3+ lineages as per YFull (23 countries, 13250 samples). As you can see, only the Indian subcontinent sees R1a-Y3+ samples, with an average of ~15-20% of all males sampled in Pakistan, India, Nepal, Bangladesh and Sri Lanka. The only thing common between these and the steppe R1a is a common ancestor who lived around 2600BCE. But if his descendant Y3 was born in the steppe, we should have seen much more Y3 in the ancient samples and in the modern distribution in the countries north of India. So where are they?
