[Paleopsych] PLOS: Recent Origin and Cultural Reversion of a Hunter–Gatherer Group

[Christian Rauh]

04-plbi-ra-0485r2_tn
<http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0030071>
*Recent Origin and Cultural Reversion of a Hunter–Gatherer Group*
Hiroki Oota, Brigitte Pakendorf, Gunter Weiss, Arndt von Haeseler, Surin
Pookajorn, Wannapa Settheetham-Ishida, Danai Tiwawech, Takafumi
Ishida, Mark Stoneking
Synopsis <http://dx.doi.org/10.1371/journal.pbio.0030116> | Full-text
<http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0030071>
| Screen PDF (123K)
<http://biology.plosjournals.org/archive/1545-7885/3/3/pdf/10.1371_journal.pbio.0030071-S.pdf>

The mtDNA analysis revealed something remarkable: all the Mlabri mtDNA
sequences were identical. 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. The Y-chromosome and autosome
analyses revealed the same reduced diversity, 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.”
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