Ghost Introgression: Spooky Gene Flow in the Distant Past.,BioEssays

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Ghost Introgression: Spooky Gene Flow in the Distant Past.
BioEssays ( IF 3.2 ) Pub Date : 2020-03-29 , DOI: 10.1002/bies.202000012
Jente Ottenburghs _{1,

2,

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Affiliation

Evolution is a continuous trial and error process in which most lineages go extinct without leaving fossil remains. Many of these lineages would be closely related and occasionally hybridized with lineages that gave rise to extant species. Hence, it is likely that one can find genetic signatures of these ancient introgression events in present-day genomes, so-called ghost introgression. The increasing availability of high-quality genome assemblies for non-model organisms and the development of more sophisticated methods for detecting introgression will undoubtedly reveal more cases of ghost introgression, indicating that the Tree of Life is even more reticulated than assumed. The presence of ghost introgression has important consequences for the study of numerous evolutionary processes, including adaptation, speciation, and macroevolutionary patterns. In addition, detailed studies of introgressed regions could provide insights into the morphology of the extinct lineage, providing an unexpected link between genomics and the fossil record. Hence, new methods that take into account ghost introgression will need to be developed.

中文翻译：

Ghost Introgression：遥远过去的幽灵基因流。

进化是一个不断试错的过程，其中大多数谱系在不留下化石遗迹的情况下灭绝。许多这些谱系与产生现存物种的谱系密切相关，偶尔会与谱系杂交。因此，人们很可能可以在当今的基因组中找到这些古代基因渗入事件的遗传特征，即所谓的幽灵基因渗入。用于非模式生物的高质量基因组组装的可用性不断增加，以及用于检测基因渗入的更复杂方法的开发无疑将揭示更多的幽灵基因渗入案例，表明生命之树比假设的更加网状。幽灵基因渗入的存在对许多进化过程的研究具有重要意义，包括适应、物种形成、和宏观进化模式。此外，对基因渗入区域的详细研究可以深入了解已灭绝谱系的形态，从而在基因组学和化石记录之间提供意想不到的联系。因此，需要开发考虑到鬼渗入的新方法。

更新日期：2020-03-29

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