文献类型：期刊文献

英文题名：Phylogeny Reconstruction and Hybrid Analysis of Populus (Salicaceae) Based on Nucleotide Sequences of Multiple Single-Copy Nuclear Genes and Plastid Fragments

作者：Wang, Zhaoshan[1] Du, Shuhui[1] Dayanandan, Selvadurai[2,3] Wang, Dongsheng[1] Zeng, Yanfei[1] Zhang, Jianguo[1]

第一作者：王兆山

通信作者：Zhang, JG[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Silviculture,State Key Lab Tree Genet & B, Beijing, Peoples R China;[2]Concordia Univ, Dept Biol, Forest & Evolutionary Genom Lab, Montreal, PQ H3G 1M8, Canada;[3]Concordia Univ, Dept Biol, Ctr Struct & Funct Genom, Montreal, PQ H3G 1M8, Canada

年份：2014

卷号：9

期号：8

外文期刊名：PLOS ONE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000341230400019)】；

基金：Financial support for this research was provided by Key Project of Research Institute of Forestry, Chinese Academy of Forestry (ZD200911), the Special Research Program for Public-welfare Forestry of China (201004035), corporation project on science and postgraduate education in Beijing and collaborative innovation plan of Jiangsu higher education. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

摘要：Populus (Salicaceae) is one of the most economically and ecologically important genera of forest trees. The complex reticulate evolution and lack of highly variable orthologous single-copy DNA markers have posed difficulties in resolving the phylogeny of this genus. Based on a large data set of nuclear and plastid DNA sequences, we reconstructed robust phylogeny of Populus using parsimony, maximum likelihood and Bayesian inference methods. The resulting phylogenetic trees showed better resolution at both inter-and intra-sectional level than previous studies. The results revealed that (1) the plastid-based phylogenetic tree resulted in two main clades, suggesting an early divergence of the maternal progenitors of Populus; (2) three advanced sections (Populus, Aigeiros and Tacamahaca) are of hybrid origin; (3) species of the section Tacamahaca could be divided into two major groups based on plastid and nuclear DNA data, suggesting a polyphyletic nature of the section; and (4) many species proved to be of hybrid origin based on the incongruence between plastid and nuclear DNA trees. Reticulate evolution may have played a significant role in the evolution history of Populus by facilitating rapid adaptive radiations into different environments.