文献类型：期刊文献

英文题名：Origin and evolutionary history of Populus (Salicaceae): Further insights based on time divergence and biogeographic analysis

作者：Liu, Xia[1,2] Wang, Zhaoshan[2] Wang, Wei[3] Huang, Qinqin[1,4] Zeng, Yanfei[2] Jin, Yu[5] Li, Honglei[1] Du, Shuhui[6] Zhang, Jianguo[2]

第一作者：Liu, Xia

通信作者：Zhang, JG[1]

机构：[1]Chongqing Univ Arts & Sci, Coll Landscape Architecture & Life Sci, Chongqing, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Silviculture,State Forestry Adm, Beijing, Peoples R China;[3]Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China;[4]Chongqing Three Gorges Univ, Coll Biol & Food Engn, Chongqing, Peoples R China;[5]Henan Acad Forestry, Qual Testing Ctr Forestry Prod, Natl & Grassland Adm, Zhengzhou, Peoples R China;[6]Shanxi Agr Univ, Forestry Coll, Jinzhong, Shanxi, Peoples R China

年份：2022

卷号：13

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000907772800001)】；

基金：This research was supported by the National Natural Science Foundation of China (31470665).

语种：英文

外文关键词：biogeography; divergence time; molecular phylogeny; Populus; bering land bridge

摘要：IntroductionPopulus (Salicaceae) species harbour rich biodiversity and are widely distributed throughout the Northern Hemisphere. However, the origin and biogeography of Populus remain poorly understood. MethodsWe infer the divergence times and the historical biogeography of the genus Populus through phylogenetic analysis of 34 chloroplast fragments based on a large sample. Results and DiscussionEurasia is the likely location of the early divergences of Salicaceae after the Cretaceous-Paleogene (K-Pg) mass extinction, followed by recurrent spread to the remainder of the Old World and the New World beginning in the Eocene; the extant Populus species began to diversity during the early Oligocene (approximately 27.24 Ma), climate changes during the Oligocene may have facilitated the diversification of modern poplar species; three separate lineages of Populus from Eurasia colonized North America in the Cenozoic via the Bering Land Bridges (BLB); We hypothesize that the present day disjunction in Populus can be explained by two scenarios: (i) Populus likely originated in Eurasia and subsequently colonized other regions, including North America; and (ii) the fact that the ancestor of the genus Populus that was once widely distributed in the Northern Hemisphere and eventually wiped out due to the higher extinction rates in North America, similar to the African Rand flora. We hypothesize that disparities in extinction across the evolutionary history of Populus in different regions shape the modern biogeography of Populus. Further studies with dense sampling and more evidence are required to test these hypotheses. Our research underscores the significance of combining phylogenetic analyses with biogeographic interpretations to enhance our knowledge of the origin, divergence, and distribution of biodiversity in temperate plant floras.