中国-喜马拉雅地区是醉鱼草属亚洲类群的分布中心和多样性中心，该区域集中分布了亚洲约90%的种类。虽然该属物种在生境、生活习性及形态特征上表现出高度的分化，但该热带起源的类群几乎均为狭窄分布在滇藏地区低海拔的物种。本申请拟在研究组16年研究醉鱼草属类群的基础上，精心挑选分布在青藏高原及黄土高原的广布种互叶醉鱼草，通过对其谱系地理学和生物学特征比较以及生态位模拟，希望能解决以下问题：①互叶醉鱼草在青藏-黄土高原区域的起源、扩散途径及现代地理分布格局的形成过程；②该物种的生物地理学特征与青藏高原隆升、东亚季风气候形成、黄土高原的堆积等地质历史事件之间的联系；③该物种在长期进化过程中对高原环境的适应机制。本研究不仅能为研究热带起源植物类群在青藏-黄土高原的物种分化和迁移机制提供重要线索，还将为研究该地区其他典型或特定植物类群的生态适应机制、生物多样性保护和生态环境恢复等提供理论依据和技术指导。

The Himalayan region in China is distribution center and diversity center of Asian Buddleja taxa, which locates about 90% Asian Buddleja species. Although species of Buddleja show a high degree of differentiation in the habitat, living habits and morphological characteristics, species of this genus derived from tropic are almost distributed narrowly at low elevation in Yunnan-Tibet region. Based on the studies of Buddleia taxa for 16 years by our research team, we select Buddleja alternifolia widely distributed in the Qinghai-Tibetan Plateau and the Loess Plateau as research species in this application. The phytogeography research, biological characteristics comparison and ecological niche modeling researches will be explored in the next four years, hoping to solve the following problems: 1, Origin, diffusion pathway and formation of modern geographical distribution pattern of Buddleja alternifolia in the Qinghai Tibet-Loess Plateau; 2, The relationship between the biogeography characteristics of Buddleja alternifolia and the geological events such as the uplift of the Qinghai Tibetan Plateau, the formation of the East Asian monsoon climate and the accumulation of the Loess Plateau; 3, Adaptation mechanism for the plateau environment derived by Buddleja alternifolia in the long term evolution procedure. This study can not only provide important clues for the studies of differentiation and migration mechanism of tropical origin plants in the Qinghai Tibet-Loess Plateau species, but also provide theoretical basis and technical guidance for ecological adaptation mechanism, biodiversity conservation and restoration of the ecological environment researches of other typical or special plant groups in this area.