Genome-wide data substantiate Holocene gene flow from India to Australia (PDF)posted by Blasdelb at 4:26 AM on January 25 [8 favorites]
The Australian continent holds some of the earliest archaeological evidence for the expansion of modern humans out of Africa, with initial occupation at least 40,000 y ago. It is commonly assumed that Australia remained largely isolated following initial colonization, but the genetic history of Australians has not been explored in detail to address this issue. Here, we analyze large-scale genotyping data from aboriginal Australians, New Guineans, island Southeast Asians and Indians. We find an ancient association between Australia, New Guinea, and the Mamanwa (a Negrito group from the Philippines), with divergence times for these groups estimated at 36,000 y ago, and supporting the view that these populations represent the descendants of an early “southern route” migration out of Africa, whereas other populations in the region arrived later by a separate dispersal. We also detect a signal indicative of substantial gene flow between the Indian populations and Australia well before European contact, contrary to the prevailing view that there was no contact between Australia and the rest of the world. We estimate this gene flow to have occurred during the Holocene, 4,230 y ago. This is also approximately when changes in tool technology, food processing, and the dingo appear in the Australian archaeological record, suggesting that these may be related to the migration from India.
Katjusa Roquette: Run this past any Aboriginal Australians and you may get into an argument. Anything stating that the people came from anyplace but the land itself is just considered objectionable.Millions of Americans believe that a woman ate an apple and got a dude kicked out of a garden party, then all their interbred children (including the ones that married giants' daughters) drowned except for one lucky DIY boatbuilder and his family.
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posted by dunkadunc at 2:09 AM on January 25 [2 favorites]