文献类型：期刊文献

英文题名：Species divergence and phylogeography of Corylus heterophylla Fisch complex (Betulaceae): Inferred from molecular, climatic and morphological data

作者：Yang, Zhen[1,2,3] Ma, Wen-Xu[1,2,3] He, Xin[1,2,3] Zhao, Tian-Tian[1,2,3] Yang, Xiao-Hong[4] Wang, Lu-Jun[5] Ma, Qing-Hua[1,2,3] Liang, Li-Song[1,2,3] Wang, Gui-Xi[1,2,3]

第一作者：Yang, Zhen;杨振

通信作者：Wang, GX[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, State Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Natl Forestry & Grassland Innovat Alliance Hazeln, Beijing 100091, Peoples R China;[3]State Forestry & Grassland Adm, Hazelnut Engn & Tech Res Ctr, Beijing 100091, Peoples R China;[4]Guizhou Acad Forestry, Guiyang 550005, Peoples R China;[5]Anhui Acad Forestry, Hefei 230031, Peoples R China

年份：2022

卷号：168

外文期刊名：MOLECULAR PHYLOGENETICS AND EVOLUTION

收录：;Scopus(收录号：2-s2.0-85123085062);WOS:【SCI-EXPANDED(收录号:WOS:000820506000007)】；

基金：We are grateful to Guan-shui Liu and Min Liu for their help in the laboratory, and for Zhao-san Wang for their valuable suggestions on data analyses. This study was financially supported by the Fundamental Research Funds of CAF (Grant No. CAFYBB2020SY007), the National Natural Science Foundation of China (Grant No. 32101541), and the Science and Technology

语种：英文

外文关键词：Species delimitation; Phylogeography; Single-copy nuclear genes; chloroplast DNA; Ecological divergence; Mophological differentiation

摘要：Historical geo-climatic changes have shaped the geographical distributions and genetic diversity of numerous plant taxa in East Asia, which promote species divergence and ultimately speciation. Here, we integrated multiple approaches, including molecular phylogeography, ecological niche modeling, and morphological traits to examine the nucleotide diversity and interspecific divergence within Corylus heterophylla complex (C. heterophylla, C. kweichowensis, and C. yunnanensis). These three sibling taxa harbored similar high levels of nucleotide diversity at the species level. The molecular data (SCNG and cpDNA) unanimously supported the division of C. heterophylla complex into two major clades, with C. yunnanensis diverged earlier from the complex, whereas C. heterophylla and C. kweichowensis could hardly be separated. The split between the two clades (c. 12.89 Ma) coincided with the formation of Sichuan Basin in the middle Miocene, while the divergence among and within the five subclades (YUN1-YUN3, HK1-HK2) occurred from the late Miocene to the Pleistocene. C. heterophylla of northern China experienced glacial contraction and interglacial expansion during the Quaternary, whereas C. kweichowensis and C. yunnanensis of southern China presented population expansion even during the last glacial maximum. Despite of high levels of genetic admixture between C. heterophylla and C. kweichowensis, significant ecological and morphological discrepancy as well as incomplete geographic isolation indicated that adaptive evolution triggered by divergent selection may have played important roles in incipient ecological speciation.