Resequencing data provide no evidence for a human bottleneck in Africa during the penultimate glacial period.
Resequencing data provide no evidence for a human bottleneck in Africa during the penultimate glacial period.
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重测序数据没有提供任何证据表明非洲在倒数第二次冰期期间存在人类瓶颈。
DOI:
10.1093/molbev/mss061
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发表时间:
2012
影响因子:
10.7
通讯作者:
M. Blum
中科院分区:
文献类型:
--
作者:
P. Sjödin;Agnès E Sjöstrand;M. Jakobsson;M. Blum
Based on the accumulation of genetic, climatic, and fossil evidence, a central theory in paleoanthropology stipulates that a demographic bottleneck coincided with the origin of our species Homo Sapiens. This theory proposes that anatomically modern humans--which were only present in Africa at the time--experienced a drastic bottleneck during the penultimate glacial age (130-190 kya) when a cold and dry climate prevailed. Two scenarios have been proposed to describe the bottleneck, which involve either a fragmentation of the range occupied by humans or the survival of one small group of humans. Here, we analyze DNA sequence data from 61 nuclear loci sequenced in three African populations using Approximate Bayesian Computation and numerical simulations. In contrast to the bottleneck theory, we show that a simple model without any bottleneck during the penultimate ice age has the greatest statistical support compared with bottleneck models. Although the proposed bottleneck is ancient, occurring at least 130 kya, we can discard the possibility that it did not leave detectable footprints in the DNA sequence data except if the bottleneck involves a less than a 3-fold reduction in population size. Finally, we confirm that a simple model without a bottleneck is able to reproduce the main features of the observed patterns of genetic variation. We conclude that models of Pleistocene refugium for modern human origins now require substantial revision.
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影响因子:
10.7
作者:
Bjork, Adam;Liu, Weimin;Worobey, Michael
通讯作者:
Worobey, Michael
DOI:
10.1073/pnas.0507325102
发表时间:
2005-12-20
影响因子:
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作者:
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通讯作者:
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影响因子:
10.7
作者:
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通讯作者:
Feldman, MW