Generic level phylogeny of Thalictroideae (Ranunculaceae) -: implications for the taxonomic status of Paropyrum and petal evolution
Generic level phylogeny of Thalictroideae (Ranunculaceae) -: implications for the taxonomic status of Paropyrum and petal evolution
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DOI：
10.2307/25065864
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发表时间：
2007-08-01
期刊：
影响因子：
3.4
通讯作者：
Chen, Zhi-Duan
中科院分区：
文献类型：
--
作者：
Wang, Wei;Chen, Zhi-Duan
Thalictroideae亚科由其染色体特征定义为单科，包含9或10个2属。在这里，我们使用叶绿体rbcL和niatK基因序列以及非编码IrnL-F和核ITS区来重建该亚家族的属水平系统发育。我们的数据识别出Thalictroideae中的三个主要类群：(1)Thalictrvin，Lcptopyruni，Paropyrurn和Paraquilegia；(2)UroPhya，Seiniaquilegia和Aquilegia；(3)Dichocurpum，Enetnion和Isopyruni。Paropyrunn和Paraquilegia是Paropyrinn的唯一种，它们是Leptopyruni的一个分支姐妹；它们共同组成了第一个类群。在第三类群中，华南等吡虫和1.地中海藻是另一个分支。Isopyrum anel？70170ideS是单系植物Faraquilegia的姊妹种。我们的数据表明，Isopyrtan是多系的，并支持分离性属Poropyrian。花瓣进化的重建表明，与无花瓣分类群是最原始的观点相反，Eneinion和Thalictrian的花瓣二次丢失。Dichcarpinn中具长柄的花瓣被证明是衍生的，驳斥了这种类型是原始条件的观点。孔雀草属的扁平花瓣可能来源于Paropyrum和Leptopyrion的管状花瓣，而有距的花瓣被认为起源于单一的祖先。
The Subfamily Thalictroideae, which is cle,[rly defined by its chromosome characters, contains nine or ten 2enera. Here,,ve use sequences of chloroplast rbcL and niatK genes as well as non-coding IrnL-F and nuclear ITS regions to reconstruct the generic level phylogeny of this subfamily. Our data recognize three major groups within Thalictroideae: (1) Thalictrvin, Lcptopyruni, Paropyrurn, and Paraquilegia; (2) Urophysa, Seiniaquilegia, and Aquilegia; and (3) Dichocurpum, Enetnion, and Isopyruni. Isopyruni anemonoides, the sole species of Paropyrinn, and Paraquilegia form a clade sister to Leptopyruni; together they make up the first group. Isopyrian inanshurician and 1. thalictroides form another clade within the third group. Isopyrum anel?70170ideS is sister to the monophyletic Faraquilegia. Our data suggest that Isopyrtan is polyphyletic and support the segregate genus Poropyrian. Reconstruction of petal evolution suggests a secondary loss of petals in Eneinion and Thalictrian, in contrast with the view that apetalous taxa, are the most primitive. Petals with lonLyer stalks in Dichocarpinn are shown to be derivative, refuting the viewpoint that this type is a primitive condition. The flat petals in Poraquilegia may be derived from the tubular-type petals in Paropyrum and Leptopyrion, and spurred petals are thought to have originated from a single ancestor.