The Phylogenetic Position of Eastern Asian Sedoideae (Crassulaceae) Inferred from Chloroplast and Nuclear DNA Sequences

从叶绿体和核DNA序列推测东亚景天科的系统发育位置

基本信息

批准号：
15570074
负责人：
OHBA Hideaki
金额：
$ 2.24万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Opinions about the delimitation and classification of the subfamily Sedoideae are still highly divergent, and thus the generic and infrageneric classification becomes one of urgent systematic problems in Crassulaceae. Various classifications of the subfamily have been proposed and there are two opposing viewpoints. One view retains Sedum as a catchall taxon and recognizes only a few additional genera under the Sedoideae, and the other segregates some groups as genera (e.g., Rhodiola, Hylotelephium, Phedimus) from Sedum on the basis of unique sets of morphological characters and recognizes a number of genera under the subfamily. It is necessary to resolve these conflicting viewpoints by testing the monophyletic status of genera separated from Sedum and clarifying their phylogenetic relationships to Sedum (s. str.). About 300 species of Sedoideae are distributed in the eastern Asian region (Ohba 1978) and most genera segregated from Sedum are restricted in eastern Asia. This region can t … More herefore be regarded as both a center of generic and infrageneric diversification and a center of distribution for the Sedoideae.I estimated the phylogeny of the Sedoideae on a broad scale across eastern Asia using sequence variation of the cpDNA trnL-trnF spacer and the Internal Transcribed Spacer regions of the nuclear ribosomal repeats to clarify the phylogenetic positions of Asian Sedoideae. Our results agreed with most of the former studies, except for the Telephium clade. All eastern Asian genera except Sedum(s. str.) were in groups corresponding to the Telephium clade and the clade was determined to be polyphyletic with four strongly supported subclades, Rhodiola, Hylotelephium, Phedimus, and Umbilicus. All eastern Asian genera segregated from Sedwnare separated in a lineage distinct from Sedum (s. str.). Hylotelephium, Orostachys, Meterostachys, and Sinocrassula are closely related. Hylotelephium is polyphyletic, as is also Orostachys. In this lecture our preliminary study on Kungia will be introduced. Less

关于亚家族台类科的划界和分类的观点仍然高度分歧，因此通用和非甘同级分类成为crassulaceae的紧迫系统问题之一。已经提出了亚家族的各种分类，并且有两个相反的观点。一种视图将景观保留为杂物分类单元，并仅识别出板条科下的几个其他属，而另一种则将某些属分离为属（例如，基于独特的形态特征，并识别出子属的属，属于sucum（例如，Rhodiola，Hylotelephium，Phedimus）。有必要通过测试与景观分离的属的单系状态并阐明其系统发育与景观的关系（s。Str。），从而解决这些矛盾的观点。东亚地区分布约300种板岩科（OHBA 1978），大多数与景观隔离的属在东亚受到限制。 This region can … More here are considered as both a center of generic and infrageneric diversification and a center of distribution for the Sedoideae.I estimated the phylogeny of the Sedoideae on a broad scale across Eastern Asia using sequence variation of the cpDNA trnL-trnF spacer and the Internal Transcribed Spacer regions of the nuclear ribosomal repeats to clarify the phylogenetic positions of Asian Sedoideae.我们的结果与以前的大多数研究都一致，除了北部进化枝。除了烟草（S. str。）以外的所有东亚属分别为对应于甲壳虫的成群，并确定枝枝是多形的，具有四个强有力的子甲基，Rhodiola，Hylotelephium，hylotelephium，Phedimus和Umbilicus。与Sedwnare隔离的所有东亚属均以与景观不同的谱系分离（s。Str。）。 Hylotelephium，Orostachys，Meterostachys和Sinocrassula密切相关。 Hylotelephium是多晶状的，Orostachys也是如此。在本讲座中，我们将介绍我们对功夫的初步研究。较少的