The Gedrosia component and the origin of R1b M269

[spongetaro]

Hello, has someone informations about Johanna Nichols’s Bactrian theory of Indo-European homeland? There must be some evidences in it of the links between european R1b and the Gedrosia component.

[MOESAN]

Yes, the Gedrosia makes more than 1/3 of the North European component for the Basque while it makes less than 1/4 of the Northern European component for the Irish. This maybe explain why the Basque don't speak an IE language.


In this case, Proto Indo European would be the language of the "North European" of the eastern steppe while Basque would be related to the more southward culture of Central Asia (carrying Gedrosia admixture to the Steppe ) of Djebel, Dam Dam Chashma, and Keltermnar.
I prefer this theory because it explains why Basque is so isolated in Europe (even compared to Iberian and Tartessian in the Iberian Peninsula) and why there is no Basque substratum in Europe.

I take on very late for these points:
I repaet (as in other threads) I red a survey that concluded it was 2 substratums in Saami finnish: one I-E satem or nearly satemized (interesting whne we look at the Y-DNA-R1a in Scandinavia), and one akin to a kind of proto-basque... look at the mtDNA-V (with a big drift it is true) among Saami
sure even if true these does not tell us what role was the Gedrosia's one (if Gedrosia autosomals is not a mirage)
have a good night rich of historical dreams - Moesan

[ElHorsto]

The SNP's available are incredibly low compared to Ötzi or any present day participant. I think it's useful to see the major components, but minor ancestries cannot be represented accurately with the present data. Forget about speculations based on this, it's not the time.

Well, if I understood correctly, the usual SNP number for analysis of contemporary humans is approx. 166000. Dienekes came up with 4000-6600 useful SNPs by overlapping the full SNP sets with the ancient ones. For finding at least 5% Gedrosian admixture, there are at least 0.05 * 4000 = 200 SNPs available to represent Gedrosian admixture after all. Statistically that should be reliable enough I would expect. But I don't understand why the overlap is so small.

[Knovas]

I understand the way you think. Noise scores usually appear even checking 166.000 SNP's, so the problem tends to increase if there are only 6.000 available. I don't know more details, but it's well known. Note that Dienekes' only considered the major components, and when someone asked him about minnor ancestries, he did not consider this relevant...well, maybe it's true, but the fact is that we don't know it