HOME >> BIOLOGY >> NEWS
An evolutionary road less traveled

Until expanding agricultural development and modernization encroached on their forest homelands, the Mlabri lived mostly as nomadic huntergatherers in the forests of northeastern Thailand and western Laos. This lifestyle is unique among the other so-called hill tribes of Thailand - who all farm - raising the possibility that the Mlabri descended from the ancient Hoabinhian huntinggathering culture of Southeast Asia. But, in a new study published in the freely-available online journal PLoS Biology, Mark Stoneking and colleagues reveal that the Mlabri are actually descended from farmers, who subsequently reverted to a huntinggathering lifestyle. This overturns our assumptions that contemporary huntergatherer groups represent the pre-agricultural lifestyle of human populations.

Stoneking and colleagues compared the genetic diversity of the Mlabri with that of six other agriculture-based hill tribes. Not only did all of the other hill tribes show "significantly higher" variation, but this lack of variation hasn't been found in any other human population, indicating a "severe reduction in population size" for the Mlabri. This reduction likely happened 500 to 800 years ago, Stoneking and colleagues conclude, and at most 1,000 years ago. But how? Since genetic analyses can't distinguish between a population bottleneck and a founding event, the authors used simulations to calculate the amount of population reduction required to completely eliminate mtDNA diversity, arriving at "not more than two unrelated females" and "perhaps even only one." Linguistic studies suggest that the Mlabri language arose after speakers of a related language, probably Tin, split off and came into contact with another, as yet unknown language, an event that likely happened less than 1,000 years ago.

The genetic and linguistic evidence indicates that the Mlabri were "founded" between 500 to 1,000 years ago by one female and one to four males from an agricultural culture. W
'"/>

Contact: Paul Ocampo
pocampo@plos.org
1-415-624-1224
Public Library of Science
21-Feb-2005


Page: 1 2

Related biology news :

1. Clones on task serve greater good, evolutionary study shows
2. New textbook illuminates the close links between evolutionary and molecular biology
3. Revolutionary global environment fund announces $50M expansion
4. DNA sequence of Rhesus macaque has evolutionary, medical implications
5. Disease can be our ally, not just our enemy, says new book by UCR evolutionary biologist
6. New book presents neurobiology from an evolutionary perspective
7. Novel salamander robot crawls its way up the evolutionary ladder
8. Human pubic lice acquired from gorillas gives evolutionary clues
9. New study rewrites evolutionary history of vespid wasps
10. Blame our evolutionary risk of cancer on body mass
11. UCLA engineers develop revolutionary nanotech water desalination membrane

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: evolutionary road less traveled

(Date:4/20/2015)... The announcement comes as demand ... Management (GRM), Ireland,s foremost records management ... built up an impressive track record of clients within the ... the records management sector in Dubai . ... staffbase and employ a further eight staff members at its ...
(Date:4/13/2015)... April 13, 2015 According ... "Global Biometrics Market Forecast & Opportunities, 2020", the global ... of around 14% till 2020. The biometrics market ... scale implementation and review of biometric management systems. ... new products with greater efficiency, are resulting in ...
(Date:4/8/2015)... , April 8, 2015  Infinisource, a ... and services, and Morpho, a leading supplier of ... to produce the market,s most advanced biometrically-enabled time ... iSolved NXG time clock is setting a bold, ... labor data for the small and mid-size employer. ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3
(Date:5/27/2015)... May 27, 2015  RXi Pharmaceuticals Corporation (NASDAQ: ... discovering and developing innovative therapies primarily in the ... on the status of the Company,s Series A ... Logo - http://photos.prnewswire.com/prnh/20130917/NE80755LOGO ... 21 shares of Series A Preferred Stock and ...
(Date:5/26/2015)... and BELLINGHAM, Washington, USA (PRWEB) May 26, 2015 ... signed a formal partnership with the Max Planck ... for Extreme and Quantum Photonics. The center will link ... field of photonics, and will be only the third ... of SPIE, the international society for optics and ...
(Date:5/26/2015)... Rialto, CA (PRWEB) May 26, 2015 ... devices and solutions in the human and animal ... company’s annual Vetericyn® Future Innovators of Agriculture College ... high school senior who exhibits a passionate commitment ... positions. , This year’s winners, Alexis Pedrow ...
(Date:5/26/2015)... , May 26, 2015  Sangamo BioSciences, Inc. (NASDAQ: ... president and CEO, will provide an update on the progress ... overview of the company,s business strategy at 1:30pm ET on ... Conference. The conference is being held in New ... webcast live and may be accessed via a link on ...
Breaking Biology Technology:RXi Pharmaceuticals Provides an Update on Series A and Series A-1 Preferred Stock 2RXi Pharmaceuticals Provides an Update on Series A and Series A-1 Preferred Stock 3Third Max Planck Centre in North America Inaugurated at University of Ottawa 2Third Max Planck Centre in North America Inaugurated at University of Ottawa 3Innovacyn Announces Winners Of This Year’s Vetericyn® College Scholarship Award 2Innovacyn Announces Winners Of This Year’s Vetericyn® College Scholarship Award 3Sangamo BioSciences Announces Presentation At The Jefferies 2015 Global Healthcare Conference 2
Cached News: