Anyone even remotely interested in this sort of subject, please keep reading. Anyone who isn’t, please consider this to be an open thread!
Interesting genetic research on the population of India,
The population of India was founded on two ancient groups that are as genetically distinct from each other as they are from other Asians, according to the largest DNA survey of Indian heritage to date. Nowadays, however, most Indians are a genetic hotchpotch of both ancestries, despite the populous nation’s highly stratified social structure.
“All Indians are pretty similar,” says Chris Tyler-Smith, a genome researcher at the Wellcome Trust Sanger Institute near Cambridge, UK, who was not involved in the study. “The population subdivision has not had a dominating effect.”
[snip]
The researchers showed that most Indian populations are genetic admixtures of two ancient, genetically divergent groups, which each contributed around 40-60% of the DNA to most present-day populations. One ancestral lineage — which is genetically similar to Middle Eastern, Central Asian and European populations — was higher in upper-caste individuals and speakers of Indo-European languages such as Hindi, the researchers found. The other lineage was not close to any group outside the subcontinent, and was most common in people indigenous to the Andaman Islands, a remote archipelago in the Bay of Bengal.
The researchers also found that Indian populations were much more highly subdivided than European populations. But whereas European ancestry is mostly carved up by geography, Indian segregation was driven largely by caste. “There are populations that have lived in the same town and same village for thousands of years without exchanging genes,” says Reich.
These findings are very interesting, and in some circles will prove to be pretty controversial. I’m interested in this because I think this genetic data pretty decisively decided the on-going Indian origins debate between the “One India” (OI) theory and the “Indo-Aryan Invasion” (IAI) theory in favour of the latter (please note: the term “Aryan” as it is used here does not have anything to do with Nazis or Nazism).
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