Evolution, Paleogenomics and Population Genetics Group, Department of Biochemistry, Microbiology, Cell Biology and Genetics, Universidad de La Laguna, San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain.
Tarha Group, Department of Historical Sciences, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Las Palmas, Spain.
Nat Commun. 2023 Aug 15;14(1):4641. doi: 10.1038/s41467-023-40198-w.
The indigenous population of the Canary Islands, which colonized the archipelago around the 3 century CE, provides both a window into the past of North Africa and a unique model to explore the effects of insularity. We generate genome-wide data from 40 individuals from the seven islands, dated between the 3-16 centuries CE. Along with components already present in Moroccan Neolithic populations, the Canarian natives show signatures related to Bronze Age expansions in Eurasia and trans-Saharan migrations. The lack of gene flow between islands and constant or decreasing effective population sizes suggest that populations were isolated. While some island populations maintained relatively high genetic diversity, with the only detected bottleneck coinciding with the colonization time, other islands with fewer natural resources show the effects of insularity and isolation. Finally, consistent genetic differentiation between eastern and western islands points to a more complex colonization process than previously thought.
加那利群岛的原住民大约在公元 3 世纪殖民了群岛，他们为我们了解北非的过去提供了一扇窗口，也为探索岛屿的影响提供了一个独特的模型。我们从七个岛屿的 40 个人身上获得了全基因组数据，这些人生活在公元 3 到 16 世纪之间。除了已经存在于摩洛哥新石器时代人群中的成分外，加那利岛的原住民还显示出与欧亚大陆青铜时代扩张和撒哈拉以南迁徙有关的特征。岛屿之间缺乏基因流动，以及固定或减少的有效种群大小表明，这些种群是孤立的。虽然一些岛屿的人口保持着相对较高的遗传多样性，唯一检测到的瓶颈与殖民时期相吻合，但其他自然资源较少的岛屿则显示出了岛屿和隔离的影响。最后，东部和西部岛屿之间的一致遗传分化表明，殖民过程比之前认为的更为复杂。
