文献类型：期刊文献

英文题名：Dispersal as a result of asymmetrical hybridization between two closely related oak species in China

作者：Chen, Jun[1,2] Zeng, Yan-Fei[3] Zhang, Da-Yong[1,2]

第一作者：Chen, Jun

通信作者：Zeng, YF[1]|[a00054eda5d58f1b4f27e]曾艳飞;

机构：[1]Beijing Normal Univ, Coll Life Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China;[2]Beijing Normal Univ, Coll Life Sci, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Beijing 100875, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat Natl Forestry &, Beijing 100091, Peoples R China

年份：2021

卷号：154

外文期刊名：MOLECULAR PHYLOGENETICS AND EVOLUTION

收录：;Scopus(收录号：2-s2.0-85092000411);WOS:【SCI-EXPANDED(收录号:WOS:000597410600009)】；

基金：This work was supported by the National Key R&D Program of China (2017YFA0605100), the "111" Program of Introducing Talents of Discipline to Universities (B13008), and a key project of State Key Laboratory of Earth Surface Processes and Resource Ecology. We are grateful to Prof. Wei-Ning Bai from Beijing Normal University and Prof. Shou-Hsien Li from Taiwan Normal University for their useful discussions of, and insightful comments on, our data analyses.

语种：英文

外文关键词：Asymmetrical hybridization; Dispersal; Gene flow; Oak

摘要：Hybridization has played an important role in plant evolution. Less attention has been paid, however, to its role in dispersal. In this study, historical divergence and hybridization were investigated in two closely related Chinese oaks, Quercus mongolica and Q. liaotungensis, to estimate the role that hybridization played in their dispersal. We genotyped 27 Q. mongolica and Q. liaotungensis populations throughout the distributional range of the two oak species, using 14 single-copy nuclear genes and four noncoding chloroplast DNA regions. Bayesian cluster and population tree analyses indicated that there were three groups over all oak populations, namely, Q. mongolica, northwest-northern China (NW-NC) Q. liaotungensis, and northeastern China (NEC) Q. liaotungensis. Approximate Bayesian computation simulation supported an asymmetrical hybridization origin of NEC Q. liaotungensis, after a previous divergence between NW-NC Q. liaotungensis and Q. mongolica. IMa3 analyses suggested that Q. liaotungensis and Q. mongolica diverged in the NW-NC and NEC regions, respectively, and that NEC Q. liaotungensis arose from Q. mongolica, not from NW-NC Q. liaotungensis, and was greatly introgressed by NW-NC Q. liaotungensis. Oak populations in NW-NC and NEC regions held different chloroplast DNA haplotypes, and Q. liaotungensis in NEC shared most haplotypes with Q. mongolica populations, but none with NW-NC Q. liaotungensis populations, suggesting the maternal origin of NEC Q. liaotungensis from Q. mongolica. This study found clear signals of isolation divergence of Q. liaotungensis in NW-NC and Q. mongolica in NEC, and the results suggest that asymmetrical hybridization and introgression from Q. liaotungensis to Q. mongolica, mostly likely via pollen flow, facilitated Q. liaotungensis dispersal to NEC.