...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant Systematics and Evolution >Molecular phylogeny of Chrysanthemum, Ajania and its allies (Anthemideae, Asteraceae) as inferred from nuclear ribosomal ITS and chloroplast trnL-F IGS sequences
【24h】

Molecular phylogeny of Chrysanthemum, Ajania and its allies (Anthemideae, Asteraceae) as inferred from nuclear ribosomal ITS and chloroplast trnL-F IGS sequences

机译：从核核糖体ITS和叶绿体trnL-F IGS序列推断出的菊花，A蚕及其盟友（国药，菊科）的分子系统发育

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To better understand the evolutionary history, intergeneric relationships and circumscription of Chrysanthemum and Ajania and the taxonomic position of some small Asian genera (Anthemideae, Asteraceae), the sequences of the nuclear ribosomal internal transcribed spacer (nrDNA ITS) and the chloroplast trnL-F intergenic spacer (cpDNA IGS) were newly obtained for 48 taxa and combined with those already deposited in GenBank. Phylogenies with an emphasis on Chrysanthemum, Ajania and its allies, by both maximum parsimony and Bayesian analysis, were constructed using either the ITS sequence alone, the IGS sequence alone or combined sequences. The IGS sequence was low phylogenetically informative, but some deletions and insertions were informative for interspecific and intergeneric delimitations. The ITS and the ITS/IGS phylogenies both suggested the presence of two major clades. The monophyly of subtribe Artemisiinae (clade A) could be retrieved when the phylogenetic positions of some ambiguous taxa were renewedly considered. Subtribe Artemisiinae was chiefly divided into two groups, (1) one corresponding to Chrysanthemum, Arctanthemum, Ajania, Opisthopappus and Elachanthemum (the Chrysanthemum group), (2) another to Artemisia, Crossostephium, Neopallasia and Sphaeromeria (the Artemisia group). Within the Chrysanthemum group, Chrysanthemum Arctanthemum and Ajania were closely related to each other, and the generic circumscription was ambiguous; Phaeostigma was excluded from this group that was also confirmed by the 6-bp insertion in the IGS sequence; radiate or rare discoid Brachanthemum was excluded, and discoid Elachanthemum without ray florets was added to this group; at the same time, Opisthopappus in subtribe Tanacetinae should be transferred to subtribe Artemisiinae and became one of the components of the Chrysanthemum group. Based on the molecular phylogenetic framework, the evolution of pollen and capitulum characters was inferred. Keywords Ajania - Artemisiinae - Chrysanthemum - Floral characters - Molecular phylogeny - Radiate genera - ITS - trnL-F
机译：为了更好地了解菊花和A豆的进化历史，属间关系和界限以及一些亚洲小属（Anthemideae，Asteraceae）的分类位置，核糖体内部转录间隔子（nrDNA ITS）的序列以及叶绿体trnL-F已为48个分类单元新获得了间隔子（cpDNA IGS），并与已经存放在GenBank中的那些结合。通过最大简约性和贝叶斯分析，着重于菊花，阿雅尼亚及其盟友的系统发育树是使用单独的ITS序列，单独的IGS序列或组合序列构建的。 IGS序列在系统发育上信息不足，但某些缺失和插入对于种间和属间定界是有益的。 ITS和ITS / IGS系统发育都表明存在两个主要进化枝。当重新考虑某些歧义类群的系统发育位置时，可以检索到青蒿亚科（A类）的一属。 Artemisiinae部落主要分为两组，（1）分别对应于菊花，Arctanthemum，Ajania，Opiphopappus和Elachanthemum（菊花组），（2）另一组属于Artemisia，Crossostephium，Neallallasia和Sphaeromeria（Artemisia组）。在菊花组中，Arctanthemum菊花和Ajania菊花之间有着密切的联系，并且通用的限制是模棱两可的。噬菌斑被排除在这一组之外，这也被IGS序列中的6bp插入所证实。放射状或罕见的盘状Brachanthemum被排除在外，无射线小花的盘状Elachanthemum被添加到该组中。同时，应将坦索那亚亚目中的鳞翅目亚目转移到青蒿亚目中，并成为菊花组的组成部分之一。基于分子系统发育框架，推断花粉和头花特征的演变。关键词Ajania-青蒿-菊花-花卉特征-分子系统发育-辐射属-ITS-trnL-F

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号