1148-淀粉酶基因扩增与安第斯人群的膳食适应 episode artwork

EPISODE · Jun 18, 2026 · 27 MIN

1148-淀粉酶基因扩增与安第斯人群的膳食适应

from 聊聊Sci

这项研究揭示了安第斯土著居民拥有全球最高水平的唾液淀粉酶基因(AMY1)拷贝数,这与其独特的饮食演变密切相关。研究人员通过分析数千个全球基因组样本发现,这种基因扩增是一种快速的适应性进化,其发生时间约为一万年前,正值该地区马铃薯驯化的初期。通过超长读长测序技术,科学家确认了这种高拷贝单倍型是由特定的重组变异机制驱动的。统计检测表明,该基因位点经历了强烈的正向选择,反映了当地人群对高淀粉饮食的遗传适应。这一发现为研究复杂基因组区域如何响应局部生存环境和饮食转变提供了重要框架。References:Scheer K, Landau LJB, Jorgensen K, Karageorgiou C, Siao L, Alkan C, Morales Rivera AM, Osborne C, Garcia OA, Pearson L, Kiyamu M, Rivera-Ch M, León-Velarde F, Lee FS, Brutsaert T, Bigham AW, Gokcumen O. Rapid adaptive increase of amylase gene copy number in Indigenous Andeans. Nat Commun. 2026 May 5;17(1):3822. doi: 10.1038/s41467-026-71450-8. PMID: 42086559; PMCID: PMC13144329.前往小宇宙评论区与主播互动

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1148-淀粉酶基因扩增与安第斯人群的膳食适应

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