Molecular phylogeny of Menthinae (Lamiaceae, Nepetoideae, Mentheae) - Taxonomy, biogeography and conflicts
Molecular phylogeny of Menthinae (Lamiaceae, Nepetoideae, Mentheae) - Taxonomy, biogeography and conflicts
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DOI：
10.1016/j.ympev.2010.01.016
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发表时间：
2010-05-01
影响因子：
4.1
通讯作者：
Heubl, Guenther
中科院分区：
文献类型：
--
作者：
Braeuchler, Christian;Meimberg, Harald;Heubl, Guenther
虽然Nepetoideae亚科（Lamiaceae）被认为是单系的，但由于复杂且可能同源的形态特征使得分类群难以划分，对亚科内部落、亚部落和属之间的关系知之甚少。利用叶绿体：trnK内含子区、trl - f区、核区：ITS区3个区域的DNA序列数据，对Menthinae亚族40个属中的38个属和11个外群属278份资料进行了进化历史重构，验证了以往的分类假设，解释了生物地理格局，阐明了性状进化。基于核和叶绿体序列数据的系统发育重建结果不一致，因此对数据进行了分离分析。核和叶绿体数据集都为三个主要谱系提供了强有力的支持：“Satureja”、“Micromeria”和“Clinopodium”群。第一个是Satureja和Gontscharovia的成员。在第二个谱系中，Micromeria s.str。和Origanum被确定为单系，Pentapleura和Zataria被确定为姐妹类群。胸腺属包括两种，使后一属为多种。胸腺与Argantoniella和Saccocalyx在质体数据集和Origanum仅显示为准葡萄性。在第三个谱系，Clinopodium-group中，分支模式在数据集之间高度不一致，可能受到最近和古代杂交，叶绿体捕获和不完整的谱系分类的影响。然而，在两种分析中推断出相同的终端群。“Micromeria”的马达加斯加血统，是最近描述的南非Killickia的姐妹，被认为代表了一个新属。喜马拉雅Clinopodium nepalense类群和热带非洲C. abyssinicum类群均为单系，但分布位置不同。这两个类群都出现在ITS系统发育中，与Cyclotrichium和Mentha在一个分支中，以前没有提出过关系。神秘的cymuligera Micromeria接近Mentha，可能是该属的一个代表。现在被认为是软足科的一部分的Acinos种与紫枝属的种混淆在一起，对软足科是否包含Acinos或紫枝属的独特性提出了质疑。所有的数据集都表明新世界的分类群是单一的，并认为它们是从旧大陆长距离分散而来的，而不是一个迁移的解释。横叉标志着两个世系的分裂。与斜足属混合的22个属被列入新世界分支，证明该属目前的界限是高度不自然的。低序列分化导致低系统发育分辨率，特别是在分支的基部，表明伴随大量生态多样化和物种形成的快速辐射。(C) 2010爱思唯尔公司版权所有。
Although the subfamily Nepetoideae (Lamiaceae) is considered to be monophyletic, relationships between tribes, subtribes and genera within the subfamily are poorly understood as complex and possibly homoplasious morphological characters make taxa difficult to delimit. DNA sequence data from three regions (chloroplast: trnK intron; trnL-F; nuclear: ITS) in total including 278 accessions, representing 38 out of 40 genera of subtribe Menthinae and 11 outgroup genera, were used to reconstruct the evolutionary history, test previous hypotheses of classification, explain biogeographic patterns and elucidate character evolution. Using maximum parsimony (MP) and Bayesian analysis phylogenetic reconstructions based on nuclear and chloroplast sequence data were incongruent, consequently the data were analyzed separately.Both nuclear and chloroplast datasets provide strong support for three major lineages: the "Satureja", "Micromeria" and "Clinopodium" group. The first contains members of Satureja and Gontscharovia. In the second lineage Micromeria s.str. and Origanum were resolved as monophyletic, Pentapleura and Zataria indicated as sister groups. Thymbra includes two species of Satureja turning the latter genus polyphyletic. Thymus is revealed as paraphyletic with respect to Argantoniella and Saccocalyx in both and Origanum in the plastid dataset only. In the third lineage, the Clinopodium-group, branching pattern is highly incongruent among datasets and possibly influenced by recent and ancient hybridization, chloroplast capture and incomplete lineage sorting. However, identical terminal groups are inferred in both analyses. A Madagascan lineage of "Micromeria", sister to the recently described South African Killickia, is suggested to represent a new genus. The Himalayan Clinopodium nepalense group and the tropical African C. abyssinicum alliance are monophyletic but indicated in different positions. Both groups appear in the ITS phylogeny in a clade with Cyclotrichium and Mentha, relationships not suggested previously. The enigmatic Micromeria cymuligera is close to Mentha and possibly is a representative of this genus. Species of Acinos, now regarded as part of Clinopodium, are mixed up with species of Ziziphora, questioning either the inclusion of Acinos in Clinopodium or generic distinctness of Ziziphora. All data sets suggest a monophyly of the New World taxa and argue for long distance dispersal from the Old World, rather than a vicariance explanation. Bystropogon marks the split up between the two lineages. Inclusion of 22 genera intermixed with Clinopodium spp. in the New World clade provides evidence that the current circumscription of the genus is highly unnatural. Low sequence divergence resulting in low phylogenetic resolution especially at the base of the clade indicate a rapid radiation accompanied by considerable ecological diversification and speciation. (C) 2010 Elsevier Inc. All rights reserved.