Zeng Liping, Zhang Qiang, Sun Renran, Kong Hongzhi, Zhang Ning, Ma Hong
State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, Institute of Biodiversity Science, Center for Evolutionary Biology, School of Life Sciences, Fudan University, 220 Handan Road, Yangpu District, Shanghai 200433, China.
Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, Guilin 541006, China.
Nat Commun. 2014 Sep 24;5:4956. doi: 10.1038/ncomms5956.
Angiosperms are the most successful plants and support human livelihood and ecosystems. Angiosperm phylogeny is the foundation of studies of gene function and phenotypic evolution, divergence time estimation and biogeography. The relationship of the five divergent groups of the Mesangiospermae (~99.95% of extant angiosperms) remains uncertain, with multiple hypotheses reported in the literature. Here transcriptome data sets are obtained from 26 species lacking sequenced genomes, representing each of the five groups: eudicots, monocots, magnoliids, Chloranthaceae and Ceratophyllaceae. Phylogenetic analyses using 59 carefully selected low-copy nuclear genes resulted in highly supported relationships: sisterhood of eudicots and a clade containing Chloranthaceae and Ceratophyllaceae, with magnoliids being the next sister group, followed by monocots. Our topology allows a re-examination of the evolutionary patterns of 110 morphological characters. The molecular clock estimates of Mesangiospermae diversification during the late to middle Jurassic correspond well to the origins of some insects, which may have been a factor facilitating early angiosperm radiation.
被子植物是最成功的植物，支撑着人类生计和生态系统。被子植物系统发育是基因功能与表型进化、分歧时间估计和生物地理学研究的基础。核心被子植物（约占现存被子植物的99.95%）的五个分支类群之间的关系仍不确定，文献中有多种假说。在这里，从26个缺乏测序基因组的物种中获得了转录组数据集，这些物种代表了五个类群中的每一个：双子叶植物、单子叶植物、木兰类植物、金粟兰科和金鱼藻科。使用59个精心挑选的低拷贝核基因进行系统发育分析，得出了支持度很高的关系：双子叶植物与一个包含金粟兰科和金鱼藻科的分支类群为姐妹关系，木兰类植物是下一个姐妹类群，其次是单子叶植物。我们的拓扑结构允许重新审视110个形态特征的进化模式。核心被子植物在侏罗纪晚期至中期多样化的分子钟估计与一些昆虫的起源非常吻合，这可能是促进早期被子植物辐射的一个因素。
