Molecular phylogeny of the endemic fern genera Cyrtomidictyum and Cyrtogonellum (Dryopteridaceae) from East Asia
Molecular phylogeny of the endemic fern genera Cyrtomidictyum and Cyrtogonellum (Dryopteridaceae) from East Asia
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东亚特有蕨类植物 Cyrtomidictyum 和 Cyrtogonellum（鳞毛蕨科）的分子系统发育
DOI：
10.1007/s13127-010-0010-6
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发表时间：
2010-03
影响因子：
1.6
通讯作者：
Wang Wei
中科院分区：
文献类型：
--
作者：
Liu Hong-Mei;Zeng Hui;Zhang Xian-Chun;Wang Wei
Cyrtomidictyum Ching和CyrtoGonellum Ching是东亚特有的两个属，它们的分类亲缘关系和系统发育关系一直存在争议。主要的不确定性围绕着这两个属与物种丰富的竹属的分离。在这里，我们提出了一个系统发育研究，重点是这些多柄蕨类植物的系统发育关系。我们根据四个叶绿体基因组区域rbc1、atpB以及基因间隔区(IGS)RPS4-TRNS和trnL-TRNF的DNA序列变异重建了它们之间的关系。最大似然和贝叶斯推断分析证实了早先的结果，即基于不太全面的分类群采样，只有一个基因(RbcL)或两个IGS(RPS4-TRNS和trnL-TRNF)。短柱蕨属(Cyrtomidictyum)是包括短柱蕨属(CyrtoGonellum)、短柱蕨属(Cyrtomum Subser)在内的多茎蕨类植物分支的姊妹种。Balansana和虎杖属的三个片断。CyrtoGonellum与多个种聚在一起，构成了水龙骨组的姊妹分类群。Sphaenopolystichum我们支持对Cyrtomidictyum的认识最初是有限的，而不是将属扩大到包括几个多茎属种或CyrtoGonellum，一些多茎属和Cyrtomum种。一回羽状叶、离生叶脉、延长叶尖和外向突起等形态特征支持该属的单子体。在叶绿体基因组中有两个同型插入，在RPS4-TRNS中有一个15bP的缺失，在trnL-trnF中有一个3bp的插入，这进一步区分了Cyrtomidictyum与其他多茎蕨类植物。小球藻与多穗蕨组的亲缘关系。得到了分子数据的高度支持。然而，尽管在RPS4-TRNS序列中插入了13个碱基，显示了CyrtoGonellum的独特之处，但没有发现共同的形态特征或分子索引。
Cyrtomidictyum Ching and Cyrtogonellum Ching are two eastern Asian endemic genera whose taxonomic affinities and phylogenetic relationships have long been controversial. The main uncertainty surrounds the separation of the two genera from the species-rich genus Polystichum. Here we present a phylogenetic study focusing on the phylogenetic relationships of these polystichoid ferns. We reconstructed the relationships based on DNA sequence variation in four chloroplast genome regions, rbcL, atpB, and the intergenic spacers (IGS) rps4-trnS and trnL-trnF. Maximum likelihood and Bayesian inference analyses confirm earlier results that were based on less comprehensive taxon sampling and either only a single gene (rbcL) or two IGS (rps4-trnS and trnL-trnF). Cyrtomidictyum is the sister of the clade of polystichoid ferns that includes Cyrtogonellum, Cyrtomium subser. Balansana and three sections of Polystichum. Cyrtogonellum groups with several species of Polystichum, and constitutes the sister taxon to Polystichum sect. Sphaenopolystichum. We support the recognition of Cyrtomidictyum as circumscribed initially, rather than expansion of the genus to include either several Polystichum species or Cyrtogonellum, some Polystichum and Cyrtomium species. The monophyly of Cyrtomidictyum is supported by morphological characters such as once-pinnate leaves, free venation, prolongated leaf apices, and exindusiate sori. Two synapomorphic indels in the chloroplast genome, one 15-bp deletion in rps4-trnS, and one 3-bp insertion in trnL-trnF further differentiate Cyrtomidictyum from other polystichoid ferns. The close affinity of Cyrtogonellum to section Sphaenopolystichum of Polystichum s.s. is highly supported by molecular data. However, no shared morphological characters or molecular indels have been detected, although the distinctness of Cyrtogonellum is shown by a 13-bp insertion in the rps4-trnS alignment.
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影响因子：
5.8
作者：
Posada, D;Crandall, KA
通讯作者：
Crandall, KA
影响因子：
0.8
作者：
A. Tryon;B. Lugardon
通讯作者：
A. Tryon;B. Lugardon
影响因子：
4.1
作者：
Geiger, JMO;Ranker, TA
通讯作者：
Ranker, TA
影响因子：
0.8
作者：
G. J. Gastony;D. Rollo
通讯作者：
G. J. Gastony;D. Rollo
DOI：
--
发表时间：
1982-12
期刊：
--
影响因子：
--
作者：
Alan R. Smith;R. Tryon;A. Tryon
通讯作者：
Alan R. Smith;R. Tryon;A. Tryon