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<strong>Recent Origin and Cultural Reversion of a Hunter–Gatherer Group</strong><br>
Hiroki Oota, Brigitte Pakendorf, Gunter Weiss, Arndt von
Haeseler, Surin Pookajorn, Wannapa Settheetham-Ishida, Danai
Tiwawech, Takafumi Ishida, Mark Stoneking<br>
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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.”<br>
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