肠蕨属和同囊蕨属的系统位置——基于叶绿体rbcL基因和rps4+rps4trnS基因间隔区序列的证据

摘要/Abstract

摘要：

摘要：为探讨肠蕨属（Diplaziopsis）和同囊蕨属（Homalosorus）的系统位置与相关类群的亲缘关系，选取这两个属中的全部植物，近缘科属25个种，以及外类群3个种的材料，对两个叶绿体DNA片段（rbcL，rps4+rps4trnS IGS）进行测序，运用最大简约法（Maximum Parsimony）、最大似然法（Maximum Likelihood）和贝叶斯推断（Bayesian Inference）对获得的序列进行联合矩阵分析，构建基因树。基因树的拓扑结构显示：1）肠蕨属和同囊蕨属组成一单系分支，且支持率较高；2）肠蕨属和同囊蕨属不与蹄盖蕨科的成员聚为一支，且关系较远；3）肠蕨属和同囊蕨属与鳞毛蕨科，铁角蕨科互为平行关系。肠蕨属和同囊蕨属形态上同铁角蕨科关系较近，前两者应被划分为单独的一个科。

关键词: 肠蕨属, 同囊蕨属, 系统发育关系, 叶绿体基因序列

Abstract:

Phylogenetic relationships and systematic positions of Diplaziopsis and Homalosorus were investigated by using two chloroplast DNA regions (rbcL and rps4+rps4trnS). All the members of these two genera, 25 species representing other related groups and three outgroups were included in the combined analyses of chloroplast DNA sequence data sets which are performed with Maximum Parsimony, Maximum Likelihood and Bayesian Inference methods. The topologies of gene trees revealed that: 1) Diplaziopsis and Homalosorus form a monophyletic group with high bootstrap value; 2) Diplaziopsis and Homalosorus are not nested in Athyriaceae; 3) Diplaziopsis and Homalosorus show a parallel phylogenetic relationship with Dryopteridaceae and Aspleniaceae. On the basis of combined DNA data sets analyses and morphological characters, Diplaziopsis and Homalosorus are proposed to be treated as a family with close relation to Aspleniaceae.

Key words: Diplaziopsis, Homalosorus, Phylogenetic relationships, Chloroplast DNA sequences

中图分类号:

Q 949

卫然1、2, 张宪春1, 齐新萍1、2、3. 肠蕨属和同囊蕨属的系统位置——基于叶绿体rbcL基因和rps4+rps4trnS基因间隔区序列的证据[J]. Plant Diversity, 2010, 32(S17): 46-54.

WEI Ran-, ZHANG Xian-Chun-, QI Xin-Ping. Phylogeny of Diplaziopsis and Homalosorus Based on Two Chloroplast DNA Sequences: rbcL and rps4+rps4trnS IGS[J]. Plant Diversity, 2010, 32(S17): 46-54.

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