Rapid, global demographic expansions after the origins of agriculture
Rapid, global demographic expansions after the origins of agriculture
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DOI：
10.1073/pnas.0914274108
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发表时间：
2011-04-12
影响因子：
11.1
通讯作者：
Mountain, Joanna L.
中科院分区：
文献类型：
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作者：
Gignoux, Christopher R.;Henn, Brenna M.;Mountain, Joanna L.
人们普遍认为，农业的发明推动了最近的人口增长。然而，独立农业起源后人口增长的直接遗传证据一直难以捉摸。我们通过一组全球分布的全线粒体基因组，在将与农业人口相关的谱系与狩猎采集者相关的谱系分开后，估计了人口规模。基于合并的分析揭示了欧洲，东南亚和撒哈拉以南非洲在过去10，000年内明显的人口扩张的有力证据。根据遗传数据对人口增长时间的估计与考古证据得出的农业最初起源的日期完全一致。通过对不同时期人口增长率的比较，我们发现，相对于更古老的狩猎采集者的扩张，农业的发明促进了人口增长的五倍。
The invention of agriculture is widely assumed to have driven recent human population growth. However, direct genetic evidence for population growth after independent agricultural origins has been elusive. We estimated population sizes through time from a set of globally distributed whole mitochondrial genomes, after separating lineages associated with agricultural populations from those associated with hunter-gatherers. The coalescent-based analysis revealed strong evidence for distinct demographic expansions in Europe, southeastern Asia, and sub-Saharan Africa within the past 10,000 y. Estimates of the timing of population growth based on genetic data correspond neatly to dates for the initial origins of agriculture derived from archaeological evidence. Comparisons of rates of population growth through time reveal that the invention of agriculture facilitated a fivefold increase in population growth relative to more ancient expansions of hunter-gatherers.