Phylogeny and biogeography of East Asian evergreen oaks (Quercus section Cyclobalanopsis; Fagaceae): Insights into the Cenozoic history of evergreen broad-leaved forests in subtropical Asia
Phylogeny and biogeography of East Asian evergreen oaks (Quercus section Cyclobalanopsis; Fagaceae): Insights into the Cenozoic history of evergreen broad-leaved forests in subtropical Asia
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东亚常绿橡树（青冈栎科；壳斗科）的系统发育和生物地理学：亚洲亚热带常绿阔叶林新生代历史的洞察
DOI：
10.1016/j.ympev.2017.11.003
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发表时间：
2018-02-01
影响因子：
4.1
通讯作者：
Hahn, Marlene
中科院分区：
文献类型：
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作者：
Deng, Min;Jiang, Xiao-Long;Hahn, Marlene
东亚常绿阔叶林（EBLF）的优势谱系青冈栎的进化史尚未利用分子工具进行全面研究。在这项研究中，我们使用基因组方法（限制性位点相关 DNA 测序，RAD-seq）重建了该谱系的第一个全面系统发育，对大约 35 个样本进行了采样。目前已识别的90种，代表了青冈属的所有主要形态类群。此外，还对其他 10 种栎属物种和两个外群进行了采样。使用宽松的时钟模型和两个化石校准来估计分歧时间。使用统计扩散-变异分析和扩散-灭绝-分支发生（DEC）模型推断祖先区域和扩散路线。青冈栎科的系统发育表明该科是单系的，包括两个主要谱系和六个分支，这些分支得到了解剖学特征的充分支持。生物地理重建表明，北半球广泛分布的栎属在始新世晚期被破坏，导致主要现存类群出现在距今33 Ma左右。青冈剖面最早的分化对应于渐新世和中新世过渡时期喜马拉雅山的阶段性隆起和印度支那的横向挤压，其中最高的多样化率出现在中新世晚期。中新世东亚夏季风强度的增强和中中新世气候最适宜期促进了中新世从中国-喜马拉雅和古热带地区向中国-日本的扩散。我们的研究结果强调了新近纪以来气候变化和印度-欧亚大陆碰撞引起的构造活动对亚洲 EBLF 谱系时空多样化模式的重要性。
The evolutionary history of Quercus section Cyclobalanopsis, a dominant lineage in East Asian evergreen broadleaved forests (EBLFs), has not been comprehensively studied using molecular tools. In this study, we reconstruct the first comprehensive phylogeny of this lineage using a genomic approach (restriction-site associated DNA sequencing, RAD-seq), sampling 35 of the ca. 90 species currently recognized, representing all main morphological groups of section Cyclobalanopsis. In addition, 10 other species of Quercus and two outgroups were also sampled. Divergence times were estimated using a relaxed clock model and two fossil calibrations. Ancestral areas and dispersal routes were inferred using statistical dispersal-vicariance analysis and the dispersal-extinction-cladogenesis (DEC) model. The phylogeny of Quercus section Cyclobalanopsis demonstrates the section to be monophyletic, comprising two main lineages and six subclades that are well supported by anatomical traits. Biogeographical reconstructions indicate that the wide northern hemisphere distribution of Quercus was disrupted in the Late Eocene, leading to the main extant groups at about 33 Ma. The earliest divergences in section Cyclobalanopsis correspond to the phased uplift of the Himalayas and lateral extrusion of Indochina at the transition of the Oligocene and Miocene, where the highest rate of diversification occurred in the late Miocene. Dispersal from Sino-Himalaya and the Palaeotropics to Sino-Japan in the Miocene was facilitated by the increased intensity of East Asian summer monsoons and by the Middle Miocene Climatic Optimum. Our results highlight the importance of climatic changes and Indo-Eurasian collision-induced tectonic activities from the Neogene onward to the spatial-temporal diversification patterns of Asian EBLF lineages.