A mixing-isolation-mixing model of speciation can potentially explain hotspots of species diversity

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 290-291
• 页数: 2页
• 语种: 英文
• DOI: 10.1093/nsr/nwy112

摘要

From comparative genomic analyses between species and population genetic analyses within species, He et al.[1] provide convincing evidence that mangrove divergence across the Malacca Straight, separating the Indian and Pacific Oceans at the Malay Peninsula, Southeast Asia, fits a model of speciation occurring over a time span that includes cycles of isolation (allopatry) interspersed by periods of mixing (gene flow).Key to this demonstration was the known biogeography of the region, and the fact that rises and falls in sea level during the period of divergence and speciation have repeatedly opened and closed the Malacca Straight to migration between the Indian and Pacific Oceans on either side of the Strait.Without this knowledge, it would have simply been concluded that speciation had occurred with gene flow, thus failing to recognize the occurrence ofallopatric phases and their likely importance in the build-up of reproductive isolating incompatibilities between taxa [2].