The First Comprehensive Phylogeny of Coptis (Ranunculaceae) and Its Implications for Character Evolution and Classification.
The First Comprehensive Phylogeny of Coptis (Ranunculaceae) and Its Implications for Character Evolution and Classification.
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黄连（毛茛科）首次全面系统发育及其对性状进化和分类的启示
DOI：
10.1371/journal.pone.0153127
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Chen ZD
中科院分区：
文献类型：
--
作者：
Xiang KL;Wu SD;Yu SX;Liu Y;Jabbour F;Erst AS;Zhao L;Wang W;Chen ZD
黄连(Ranunculaceae)有15种，是东亚最重要的药用植物属之一。对该属内形态特征的进化和系统发育关系的了解非常有限。在这里，我们首次提出了基于两个叶绿体和一个核标记的该属的全面系统发育分析。用贝叶斯推断以及最大简约法和最大似然法重建了系统发育。使用Swofford-Olsen-Waddell-Hillis检验和贝叶斯检验来评估传统分类单位与系统发育推论所建议的分类单位之间的冲突强度。形态特征的进化被用贝叶斯方法来识别属下谱系的突触同形。我们的数据确认了黄连内部两个强有力的支系。第一个分支包括黄连亚属和尖顶黄连亚属的日本组，由形态特征支持，如中央小叶基座的特征，花瓣颜色和花瓣形状。第二个支系为后冠亚属的日本冠亚组。五叶黄连与五叶黄连并不是统一的，相反，认为五叶黄连是五叶黄连的异名。中国锦鸡儿的两个变种不聚在一起。罗汉黄连和黄连分别退化为三叶黄连和日本黄连。黄连属植物的中央小叶基数、瓣片形状和花瓣叶片携带着较强的系统发育信号，而叶型、花瓣颜色和花瓣形状显示出相对较高的进化灵活性水平。
Coptis (Ranunculaceae) contains 15 species and is one of the pharmaceutically most important plant genera in eastern Asia. Understanding of the evolution of morphological characters and phylogenetic relationships within the genus is very limited. Here, we present the first comprehensive phylogenetic analysis of the genus based on two plastid and one nuclear markers. The phylogeny was reconstructed using Bayesian inference, as well as maximum parsimony and maximum likelihood methods. The Swofford-Olsen-Waddell-Hillis and Bayesian tests were used to assess the strength of the conflicts between traditional taxonomic units and those suggested by the phylogenetic inferences. Evolution of morphological characters was inferred using Bayesian method to identify synapomorphies for the infrageneric lineages. Our data recognize two strongly supported clades within Coptis. The first clade contains subgenus Coptis and section Japonocoptis of subgenus Metacoptis, supported by morphological characters, such as traits of the central leaflet base, petal color, and petal shape. The second clade consists of section Japonocoptis of subgenus Metacoptis. Coptis morii is not united with C. quinquefolia, in contrast with the view that C. morii is a synonym of C. quinquefolia. Two varieties of C. chinensis do not cluster together. Coptis groenlandica and C. lutescens are reduced to C. trifolia and C. japonica, respectively. Central leaflet base, sepal shape, and petal blade carry a strong phylogenetic signal in Coptis, while leaf type, sepal and petal color, and petal shape exhibit relatively higher levels of evolutionary flexibility.