Sympatric speciation revealed by genome-wide divergence in the blind mole rat Spalax

Proceedings of the National Academy of Sciences of the United States of America
Kexin LiHuabin Zhao

Abstract

Sympatric speciation (SS), i.e., speciation within a freely breeding population or in contiguous populations, was first proposed by Darwin [Darwin C (1859) On the Origins of Species by Means of Natural Selection] and is still controversial despite theoretical support [Gavrilets S (2004) Fitness Landscapes and the Origin of Species (MPB-41)] and mounting empirical evidence. Speciation of subterranean mammals generally, including the genus Spalax, was considered hitherto allopatric, whereby new species arise primarily through geographic isolation. Here we show in Spalax a case of genome-wide divergence analysis in mammals, demonstrating that SS in continuous populations, with gene flow, encompasses multiple widespread genomic adaptive complexes, associated with the sharply divergent ecologies. The two abutting soil populations of S. galili in northern Israel habituate the ancestral Senonian chalk population and abutting derivative Plio-Pleistocene basalt population. Population divergence originated ∼0.2-0.4 Mya based on both nuclear and mitochondrial genome analyses. Population structure analysis displayed two distinctly divergent clusters of chalk and basalt populations. Natural selection has acted on 300+ genes across the genom...Continue Reading

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Citations

Feb 20, 2016·Cell Stress & Chaperones·Karl A RodriguezRochelle Buffenstein
Feb 10, 2016·Proceedings of the National Academy of Sciences of the United States of America·Yang ZhaoEviatar Nevo
Jun 25, 2016·Proceedings of the National Academy of Sciences of the United States of America·Kexin LiEviatar Nevo
Jul 3, 2016·Proceedings of the National Academy of Sciences of the United States of America·Kexin LiEviatar Nevo
Sep 1, 2019·BMC Evolutionary Biology·Hengwu JiaoHuabin Zhao
Mar 4, 2020·Proceedings of the National Academy of Sciences of the United States of America·Hongwei WangLingrang Kong
Oct 23, 2019·PeerJ·Jacobus H VisserBettine Jansen van Vuuren
Dec 6, 2020·Proceedings of the National Academy of Sciences of the United States of America·Kexin LiEviatar Nevo
Jul 10, 2021·Molecular Biology and Evolution·Hengwu JiaoHuabin Zhao

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