Infra-familial phylogeny of Urticaceae, using chloroplast sequence data
Infra-familial phylogeny of Urticaceae, using chloroplast sequence data
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DOI：
10.1071/sb08041
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发表时间：
2008-12-05
影响因子：
1.6
通讯作者：
Quinn, Christopher J.
中科院分区：
文献类型：
--
作者：
Hadiah, Julisasi T.;Conn, Barry J.;Quinn, Christopher J.
最近的研究表明，天蚕科，至少部分，应包括在荨麻科。为了评估这两个类群之间的系统发育关系，以及部落的概念（荨麻科），包括任何部分的Cecropiaceae在荨麻科的后果，我们分析了较大的数据库的rbcL和trnL-F序列的序列变异。我们的结论是，荨麻科的界限需要扩大到包括Cecropiaceae的类群，与荨麻科在这里扩大到包括Poikilospermum。Cecropia和属（均为Cecropiaceae）的部落位置尚不清楚，但它们与Forsskaoleae，Parietarieae和Boehmerieae有亲缘关系。苎麻族的界限应该改变，以排除千果草属，后者与楼梯草族表现出很强的关系。楼梯草族的内部结构不清楚，因为Myriocarpa的位置的不确定性，但有一个强烈的建议，该部落由两个姐妹分类群组成，一个是楼梯草族狭义，包括楼梯草属和Procris，另一个由Lecanthus和冷水花组成。这是重新确认赤车属不应该被认为是一个独特的属，并在这里被视为一个异名Procris，而不是一部分的同义词楼梯草，如前所述。Boehmeria、Cypholophus和Laportea目前的分类都是并系的。本研究揭示了荨麻科的3个进化谱系，即（1）苎麻族-天仙子族-毛蕊花族-墙草族，（2）荨麻族和（3）楼梯草族。
Recent studies of the phylogeny of the Urticales have suggested that Cecropiaceae, at least in part, should be included within Urticaceae. To evaluate phylogenetic relationship between these two taxa, together with the consequences on tribal concepts (of the Urticaceae) of including any part of Cecropiaceae within Urticaceae, we analysed sequence variation for larger databases of both rbcL and trnL-F sequences. We conclude that the circumscription of Urticaceae needs to be broadened to include taxa of Cecropiaceae, with Urticeae here expanded to include Poikilospermum. The tribal placement of Cecropia and Coussapoa (both Cecropiaceae) remains unclear but their affinities are with the Forsskaoleeae, Parietarieae and Boehmerieae. The circumscription of Boehmerieae should be changed to exclude Myriocarpa, with the latter genus exhibiting a strong relationship with Elatostemeae. The intratribal structure of the Elatostemeae is unclear because of the uncertainty of the position of Myriocarpa, but there is a strong suggestion that the tribe consists of two sister taxa, one of Elatostemeae sensu stricto, including Elatostema and Procris, and the other consisting of Lecanthus and Pilea. It is reconfirmed that Pellionia should not be recognised as a distinct genus and is here regarded as a synonym of Procris, rather than part of the synonymy of Elatostema, as previously suggested. Boehmeria, Cypholophus and Laportea as currently circumscribed are all paraphyletic. There are three evolutionary lineages in the Urticaceae revealed by our study, namely (1) Boehmeriea-Cecropieae-Forsskaoleeae-Parietarieae, (2) Urticeae and (3) Elatostemeae.