太行山近期隆升促进太行花属(蔷薇科)谱系分化OA北大核心CSTPCD

Taihangia is a monotypic genus of the Rosaceae and endemic to the southern part of Taihang Mountains.Two varieties(T.rupestris var.rupestris and T.rupestris var.ciliate)are circumscribed currently under the species T.rupestris.However,the taxonomic status of these two varieties is still controversial and very few studies on the evolutionary history of this genus.In this study,a plastid phylogenomic analysis of Taihangia was conducted and the temporal evolutionary history of the genus was investigated.The results showed that the monophyly of the genus and also the two varieties were all recovered with strong support.In addition,the genus started to diverge at ca.2.60 million years ago(Ma)near the Pliocene-Pleistocene boundary,and diversification events within the two varieties were estimated mostly during the late Pleistocene,which is highly consistent in time scale with the recent uplift of the southern part of the Taihang Mountains that occurred during the Pliocene and Pleistocene.Thus,we propose that the uplift of the southern part of Taihang Mountains may have played an important role in triggering the lineage diversification within the genus Taihangia.The present study not only enhances our understanding on the evolutionary history of Taihangia,but also provides a case study in understanding the relationship between diversification of plant lineages and mountains uplifting occurred in Asia.