1 members found this post helpful.
I've tried matching up the spread of IE languages with development patterns in autosomal DNA, and cannot find clear trails from specifically an Irano-Armenian origin point. In my opinion, it is not the most likely point of origin for the core language group.
Culture is something else though. And there is also no one origin point for Indo-Europeans - people speaking IE languages descended from lots of different populations, and many people would have simply adopted these languages as the lingua francas of their time over the course of their history.
My calculations suggest that the first branchings of IE speaking people most likely occurred in a population ancestral to both Southern Steppe Yamnayans and early Armenians, probably located North of the Caucasus.
Having said that, these proto-IE speakers would most likely have spread to Armenia/Iran first, and the Baltic next. The model suggests IE was probably not spoken by core Anatolians, nor by West/Central R1b Beaker people until some time later.