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Land bridges in the Pleistocene contributed to flora assembly on the continental islands of South China: Insights from the evolutionary history of Quercus championii
Jiang, Xiao-Long; Gardner, Elliot M.; Meng, Hong-Hu; Deng, Min3,7; Xu, Gang-Biao
2019
Source PublicationMOLECULAR PHYLOGENETICS AND EVOLUTION
ISSN1055-7903
Volume132Issue:xPages:36-45
Abstract

The South China Mainland (SCM) and its adjacent continental islands are a global biodiversity hotspot. However, how and when plants dispersed between SCM and Hainan/Taiwan Islands remains largely unknown. In this study, we used restriction site-associated DNA sequencing (RAD-seq) to identify the demographic dynamics and local adaptation of Quercus championii, a dominant forests tree distributed in SCM and Hainan/Taiwan Islands. Through phylogenetic reconstruction, principal components analysis (PCA) and structure analysis, we identified four distinct Q. championii lineages that correspond to its geographical distribution. The genetic structure of Hainan Island population was distinct, possibly reflecting an introgression. We conducted an approximate Bayesian computation analyses and found that Q. championii originated from Southwest China-Northern Vietnam, then dispersed to Southeast China as the climate warmed. During the Pleistocene glacial period, land bridges arose between SCM and Hainan/Taiwan Islands, and the land bridges likely facilitated species dispersal from SCM to these islands. We found a strong correlation between genetic variation and isothermality through a gradient forest analysis and identified precipitation seasonality as a key driver to the local adaptation of Q. championii. Finally, we analyzed putative adaptation loci and identified genes regulating vegetative and reproductive organ development as important for the adaptation of Q. championii to heterogeneous environments. We provide new insights into the evolutionary history and local adaptation of biotas in Southern China and adjacent islands.

KeywordAmerican Live Oaks Genetic-structure Tibetan Plateau Climate-change Sea-level R-package Biodiversity Phylogeography Landscape Hainan
Subject AreaBiochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
DOI10.1016/j.ympev.2018.11.021
Indexed BySCI
Language英语
WOS IDWOS:000456566000004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11192
Collection植物系统与保护生物学研究组
Affiliation1.[Jiang, Xiao-Long
2.Cent South Univ Forestry & Technol, Lab Forestry Genet, Changsha 410004, Hunan, Peoples R China
3.[Jiang, Xiao-Long
4.Chinese Acad Sci, Shanghai Chenshan Plant Sci Res Ctr, Shanghai Chenshan Bot Garden, Shanghai 201602, Peoples R China
5.[Gardner, Elliot M.] Morton Arboretum, 4100 IL-53, Lisle, IL 60532 USA
6.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Ctr Integrat Conservat, Kunming 650223, Yunnan, Peoples R China
7.[Jiang, Xiao-Long
8.Chinese Acad Sci, Southeast Asia Biodivers Res Inst, Yezin 05282, Nay Pyi Taw, Myanmar
Recommended Citation
GB/T 7714
Jiang, Xiao-Long,Gardner, Elliot M.,Meng, Hong-Hu,et al. Land bridges in the Pleistocene contributed to flora assembly on the continental islands of South China: Insights from the evolutionary history of Quercus championii[J]. MOLECULAR PHYLOGENETICS AND EVOLUTION,2019,132(x):36-45.
APA Jiang, Xiao-Long,Gardner, Elliot M.,Meng, Hong-Hu,Deng, Min,&Xu, Gang-Biao.(2019).Land bridges in the Pleistocene contributed to flora assembly on the continental islands of South China: Insights from the evolutionary history of Quercus championii.MOLECULAR PHYLOGENETICS AND EVOLUTION,132(x),36-45.
MLA Jiang, Xiao-Long,et al."Land bridges in the Pleistocene contributed to flora assembly on the continental islands of South China: Insights from the evolutionary history of Quercus championii".MOLECULAR PHYLOGENETICS AND EVOLUTION 132.x(2019):36-45.
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