Why hunter-gatherer populations do not show signs of pleistocene demographic expansions.

  title={Why hunter-gatherer populations do not show signs of pleistocene demographic expansions.},
  author={Laurent Excoffier and Stefan Schneider},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={96 19},
The mitochondrial DNA diversity of 62 human population samples was examined for potential signals of population expansions. Stepwise expansion times were estimated by taking into account heterogeneity of mutation rates among sites. Assuming an mtDNA divergence rate of 33% per million years, most populations show signals of Pleistocene expansions at around 70,000 years (70 KY) ago in Africa and Asia, 55 KY ago in America, and 40 KY ago in Europe and the Middle East, whereas the traces of the… CONTINUE READING
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