Posted on 01/31/2006 11:42:30 AM PST by blam
India cultivated homegrown farmers
Bruce Bower
Approximately 10,000 years ago, hunter-gatherers living in what's now India adapted agricultural practices for their own purposes rather than giving way to an influx of foreign farmers, a new genetic study suggests.
Y SPREAD. Maps of India and surrounding regions denote where a Y chromosome marker occurs more frequently (dark green) and less frequently (light green) in caste populations (larger map) and tribal groups (inset). Kashyap/PNAS
Comparisons of men's Y chromosomes show that nearly all Indian men today, regardless of their tribe or caste, are descendants of populations that inhabited South Asia before agriculture's introduction to the region, concludes a team led by Vijendra K. Kashyap of the National Institute of Biologicals in Noida, India.
The scientists analyzed Y chromosome differences among 936 Indian men representing 77 different populations, including castes. Participants spoke languages from the country's four major linguistic groups.
Indian men from the various groups displayed substantial genetic similarities and few signs of DNA influences from western Asia, where other researchers had already probed patterns in male chromosomes. A gradually declining frequency of common Y chromosome markers from southern to northern India and into central Asia indicates that India's ancient inhabitants migrated northward, Kashyap's team concludes in the Jan. 24 Proceedings of the National Academy of Sciences.
Because modern caste populations in India often cultivate crops and speak Indo-European languages, researchers have long hypothesized that these people derived from western or central Asian farmers who migrated southward. Native South Asians more likely borrowed agriculture techniques and developed them on their own, assert Kashyap and his coworkers.
Previous studies of mitochondrial DNA, which is inherited through the mother, suggest that Africans settled South Asia between 70,000 and 40,000 years ago.
A related debate concerns whether agriculture spread throughout Europe as a result of the migration of Middle Eastern farmers or of the adoption of cultivation by native Europeans (SN: 12/3/05, p. 358: Available to subscribers at http://www.sciencenews.org/articles/20051203/fob5.asp).
GGG Ping.
An Asian origin for a 10,000-year-old domesticated plant in the Americas
PNAS | 2005-12-13 | David L. Erickson , Bruce D. Smith , Andrew C. Clarke, Daniel H. Sandweiss, and Noreen Tuross
Posted on 12/17/2005 7:56:15 AM PST by Lessismore
http://www.freerepublic.com/focus/f-news/1542348/posts
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Interesting post....I am interested in the connections between the DN record and the history mentioned in the Vedas (esp. the Rig Veda). These connections might provide more information on the origins of agriculture in the subcontinent.
Thanks for the ping, SunkenCiv.
I think the Vedas were Rigged. [rimshot]
That would make it the "Rigged Veda" then, wouldn't it? LOL...
I guess you didn't notice the 'rimshot' part. Lol!
I did....;)
You might want to ping the genetic genealogy list.
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