A solution to the problem of Indo-Aryan originshttp://dienekes.blogspot.com/2010/12/solution-to-problem-of-indo-aryan.htmlecad blog, I have been tracking a mysterious "Dagestan" genetic component in South Asia and Europe. This component is modal in populations of Dagestan: Dargins from Urkarah, Lezgins, and Kumyks from Stalskoe.
Surprisingly, this component occurs at a high frequency in some South Asian populations, including Telugu and Tamil Brahmins from South India. These are believed to be descended from Indo-Aryan speakers from North India and to have maintained a genetic distinctiveness vis a vis the native inhabitants of South India.
We have one piece of evidence of the association of this component with Indo-Aryans: its presence in Brahmins and absence from low caste and tribal groups.
But, there is a different source of evidence that can potentially complete the argument: the non-Indo-European speakers of Pakistan: the Dravidian Brahui and the Burushaski speakers.
My theory predicts that they should have less of this component than Indo-Aryan and Iranian speakers from Pakistan such as Pathans, Sindhi, and Balochi. To test this, I repeated my South Asian experiment, but this time I added these two populations as well.
As you can see, the component is minimized in tribals, low castes, and non-Indo-European groups of Pakistan (Burusho and Brahui).