青藏高原隆升对点地梅属亚洲分支物种多样性的影响

全球的生物多样性热点多集中在山地。研究造山运动对物种多样性的影响有助于理解全球生物多样性格局的演变。青藏高原是重要的生物多样性热点区域，高原隆升是该地区物种多样性形成的主要驱动力。但以往的研究常忽视青藏高原隆升的地质历史，导致对物种在不同的地质时间和地理空间上响应高原隆升的演化模式还不明确。本项目拟以点地梅属亚洲分支为对象，针对青藏高原中部、喜马拉雅和横断山三个地质年代不同的区域开展对比性的研究。在点地梅属的框架下开展系统发育基因组学、生物地理学和物种分化速率分析，并选取邻域和异域分布的4个姐妹种对开展谱系地理和群体遗传分析。据此可以推断点地梅属亚洲分支在青藏高原不同地质时期的物种分化过程（物种迁移和种群扩张等），揭示点地梅属亚洲分支的物种分化速率随时间的变化和在上述三个区域的差异及其成因。本项目的开展可为研究青藏高原物种多样性的形成机制提供新的思路，也为该地区生物多样性保护提供理论依据。

Most of the biodiversity hotspots on earth are distributed in mountain areas. Studying the impact of orogeny of high mountain ranges on species diversity will contribute to the understanding of the evolution of global biodiversity. In Qinghai-Tibetan Plateau (QTP), an important biodiversity hotspot, the uplift of QTP has been regarded as the main driving force for the species diversity in this region. However, previous studies have always neglected the geological history of the uplift of QTP, therefore, the species evolution patterns responding to the uplift of QTP in different geological time and geographic space remain unclear so far. In the present project, the species diversity of Androsace Asian Clade among the central QTP, the Himalayas and the Hengduan mountains, which are uplifted in different geological period, will be investigated. At the interspecific level, the phylogenomics, biogeography and species diversification rate analysis of Androsace Asian Clade will be carried out in the phylogenetic framework of Androsace. Furthermore, the phylogeography and population genetics of four parapatric or allopatric sister species pairs will be analyzed. The species diversification process of Androsace Asian Clade (including species migration and population expansion, etc.) in different geological periods of the QTP will be deduced, the diversification pattern of Androsace Asian Clade in the three regions will be revealed and compared, and the causes for the differences will be discussed. The results of this study will provide new insights in the mechanism leading to species diversity in the region of QTP, which will also contributed to the biodiversity conservation in this area.