Spatiotemporal evolution of the global species diversity of Rhododendron Xiao-Mei Xia Institute of Botany, Chinese Academy of Sciences Miao-Qin Yang State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences Cong-Li Li State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences Si-Xin Huang State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences Fei Wang West China Subalpine Botanical Garden, Institute of Botany, Chinese Academy of Sciences Xiao-Hua Li Lushan Botanical Garden, Institute of Botany, Chinese Academy of Sciences Watanabe Yoichi Graduate School of Horticulture, Chiba University Le-Hua Zhang Lushan Botanical Garden, Institute of Botany, Chinese Academy of Sciences Yuanrun Zheng Key Laboratory of Resource Plants, West China Subalpine Botanical Garden, Institute of Botany, Chinese Academy of Sciences Xiao-Quan Wang (
[email protected] ) State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences Article Keywords: Rhododendron, rediversication, spatiotemporal evolution Posted Date: December 29th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-125967/v1 Page 1/25 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 2/25 Abstract How large cosmopolitan plant genera survived great environmental changes and rediversied remains largely unknown. Here we investigated mechanisms underlying the rediversication of Rhododendron, the largest genus of woody plants in the Northern Hemisphere. Using 3437 orthologous nuclear genes, we reconstructed the rst completely resolved and dated phylogeny of Rhododendron. We found that most extant species of Rhododendron originated by Neogene rediversication from Paleogene relicts during southern migration.