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:11/4/2014)... Nov. 4, 2014   Neurotechnology , a ... that the latest version of its fingerprint matching ... Ongoing MINEX evaluation organized by NIST. The ... using the INCITS 378 fingerprint standard template format. ... public tenders in the United States ...
(Date:11/3/2014)... study published in this month,s Proceedings of ... of a recently discovered communication molecule of the body,s ... known to limit inflammation and the current study reports ... the ability of the immune system to recognize and ... IL-37,s effect on the immune system now allows us ...
(Date:11/3/2014)... that low birth weight and preterm birth are linked ... adulthood. Findings published in the American College of Rheumatology ... that low birth weight and pre-term babies were not ... as adults. , According to the ACR, 27 ... with clinical OA. Symptoms of OA range from mild ...
Breaking Biology News(10 mins):Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 2Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 3PNAS: From HIV to cancer, IL-37 regulates immune system 2Preterm, low birth-weight babies may need new hips in adulthood 2
(Date:11/21/2014)... 2014 , Todd Martensen ... Mariano Rodríguez es elegid vicepresidente senior de desarrollo ... está en marcha para comenzar de forma rápida la comercialización ... reciente aprobación en Europa   , ... anunciar los siguientes nombramientos: Todd Martensen ...
(Date:11/21/2014)... 2014 Author Matthew J. Pallamary’s second ... Other Side” published as a tribute to his ... “Fiction: Short Story” category of the 2014 USA ... CEO of USA Book News, said this year’s contest ... including Simon & Schuster, Penguin, John Wiley & Sons, ...
(Date:11/21/2014)... 20, 2014 BlueInGreen, LLC ( ... LLC (Pinnacle), and PCI, Inc., leading suppliers of ... have been selected to provide a new state-of-the-art ... Paul R. Noland Wastewater Treatment. The new ... HyDOZ® gas dissolution technology, Pinnacle Ozone’s industry ...
(Date:11/21/2014)... Nov. 20, 2014 Polaris Group announced ... in its Phase 1 trial of ADI-PEG 20 ... treatment of malignant pleural mesothelioma (MPM) and non-squamous ... clinical trials on ADI-PEG 20, both as monotherapy ... treatment of several other indications, including breast cancer, ...
Breaking Biology Technology:KLOX Technologies anuncia sus nombramientos ejecutivos 2KLOX Technologies anuncia sus nombramientos ejecutivos 3KLOX Technologies anuncia sus nombramientos ejecutivos 4KLOX Technologies anuncia sus nombramientos ejecutivos 5Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 2Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 3Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 4City of Fayetteville Leads Nation with Innovative Ozone Technology 2City of Fayetteville Leads Nation with Innovative Ozone Technology 3City of Fayetteville Leads Nation with Innovative Ozone Technology 4Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2
Cached News: