Molecular phylogeny of the nettle family (Urticaceae) inferred from multiple loci of three genomes and extensive generic sampling
Molecular phylogeny of the nettle family (Urticaceae) inferred from multiple loci of three genomes and extensive generic sampling
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DOI：
10.1016/j.ympev.2013.06.022
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发表时间：
2013-12-01
影响因子：
4.1
通讯作者：
Li, De-Zhu
中科院分区：
文献类型：
--
作者：
Wu, Zeng-Yuan;Monro, Alex K.;Li, De-Zhu
荨麻科是被子植物家族中较大的一个，但其内部的关系仍然知之甚少。采用最大似然法（ML）、最大简约法（MP）和贝叶斯推理法（BI）对两个核位点（ITS和185）、四个叶绿体位点（marK、rbcL、rpl14-rps8-infA-rpl36、trnL-trnF）和一个线粒体位点（matR）的DNA序列数据进行了分析。我们采集了169份资料，122个物种，代表了荨麻科54个属中的47个，包括6个有时被划分为麻科的4个。主要结果包括：(1)荨麻科（包括天蚕科）属单系；(2)天蚕科为两系系，两系都嵌套在荨麻科内；(3)荨麻科可分为4个支系；(4)先前建立的部落或亚家族得到了广泛的支持，并有一些增加和改变；(5)许多属具有单系性，其中Boehmeria、Pellionia、Pouzolzia和Urera属具有明显的多系性，而Urtica和Pilea属中各有一个小属嵌套；(6)阐明了属间的关系，多数属间的关系得到了有力的支持。这些结果澄清了以往对该科分类中某些形态特征的夸大和其他形态特征的低估，为今后对该科生物地理、性状进化和难属划分的研究提供了坚实的基础。(C) 2013爱思唯尔公司版权所有。
Urticaceae is one of the larger Angiosperm families, but relationships within it remain poorly known. This study presents the first densely sampled molecular phylogeny of Urticaceae, using maximum likelihood (ML), maximum parsimony (MP) and Bayesian inference (BI) to analyze the DNA sequence data from two nuclear (ITS and 185), four chloroplast (marK, rbcL, rpl14-rps8-infA-rpl36, trnL-trnF) and one mitochondrial (matR) loci. We sampled 169 accessions representing 122 species, representing 47 of the 54 recognized genera within Urticaceae, including four of the six sometimes separated as Cecropiaceae. Major results included: (1) Urticaceae including Cecropiaceae was monophyletic; (2) Cecropiaceae was biphyletic, with both lineages nested within Urticaceae; (3) Urticaceae can be divided into four well-supported clades; (4) previously erected tribes or subfamilies were broadly supported, with some additions and alterations; (5) the monophyly of many genera was supported, whereas Boehmeria, Pellionia, Pouzolzia and Urera were clearly polyphyletic, while Urtica and Pilea each had a small genus nested within them; (6) relationships between genera were clarified, mostly with substantial support. These results clarify that some morphological characters have been overstated and others understated in previous classifications of the family, and provide a strong foundation for future studies on biogeography, character evolution, and circumscription of difficult genera. (C) 2013 Elsevier Inc. All rights reserved.