Climate heterogeneity shapes phylogeographic pattern of Hippophae gyantsensis (Elaeagnaceae) in the east Himalaya‐Hengduan Mountains

作者：Ting Xu, Ruixue Wang, La Qiong, Takahiro Yonezawa, Xinyi Huang, Kun Sun, Zhiping Song, Yuguo Wang, Igor V. Bartish, Wenju Zhang, Shanmei Cheng · 发表于：Ecology and Evolution · 年份：2023 · DOI：10.1002/ece3.10182 · 被引用次数：6 · 研究领域：Phytochemical and Pharmacological Studies、Botany, Ecology, and Taxonomy Studies、Botany and Plant Ecology Studies

Abstract The interaction of recent orographic uplift and climate heterogeneity acted as a key role in the East Himalaya‐Hengduan Mountains (EHHM) has been reported in many studies. However, how exactly the interaction promotes clade diversification remains poorly understood. In this study, we both used the chloroplast trn T‐ trn F region and 11 nuclear microsatellite loci to investigate the phylogeographic structure and population dynamics of Hippophae gyantsensis and estimate what role geological barriers or ecological factors play in the spatial genetic structure. The results showed that this species had a strong east–west phylogeographic structure, with several mixed populations identified from microsatellite data in central location. The intraspecies divergence time was estimated to be about 3.59 Ma, corresponding well with the recent uplift of the Tibetan Plateau. Between the two lineages, there was significant climatic differentiation without geographic barriers. High consistency between lineage divergence, climatic heterogeneity, and Qingzang Movement demonstrated that climatic heterogeneity but not geographic isolation drives the divergence of H. gyantsensis , and the recent regional uplift of the QTP, as the Himalayas, creates heterogeneous climates by affecting the flow of the Indian monsoon. The east group of H. gyantsensis experienced population expansion c . 0.12 Ma, closely associated with the last interglacial interval. Subsequently, a genetic admixture event b...