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首页> 外文期刊>Systematic Botany >Molecular Phylogeny of the Jimsonweed Genus Datura (Solanaceae)
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Molecular Phylogeny of the Jimsonweed Genus Datura (Solanaceae)

机译：Jimsonweed曼陀罗属（茄科）的分子系统发育

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摘要

Phylogenetic analyses were performed based on four plastid DNA sequences to determine if the Daturae and Datura are monophyletic and to understand their relationships and classification. Species of Datum have been divided into three sections based upon the position and type of the fruit: Ceratocaulis, Datura, and Dutra. Our analyses confirmed the monophyly of the Daturae clade with two genera, Datura with herbaceous species and Brugmansia with woody species. The Datura clade consists of two distinct lineages, that of D. ceratocaula, corresponding to the monospecific section Ceratocaulis, and one that gives rise to the remaining species of the genus. The large clade readily divides into two groups but they do not correspond to the conventional classification of the genus. Species with regularly dehiscent capsular fruits are present in both groups while species with irregularly dehiscent capsules are found in only one group. Because section Dutra is polyphyletic, realignment of species within two traditional sections is necessary as follows: Datum containing D. arenicola, D. discolor, D. ferox, D. quercifolia, D. kymatocrapa, D. leichhardtii, and D. stramonium; Dutra containing D. inoxia, D. lanosa, D. metel, D. reburra, and D. wrightii. The seed margin clearly distinguishes these sections, rather than the combination of fruit position and dehiscence which has been used previously.
机译：根据四个质体DNA序列进行了系统发育分析，以确定曼陀罗和曼陀罗是否是单系的，并了解它们之间的关系和分类。根据水果的位置和类型，基准种被分为三个部分：角果树，曼陀罗和杜特拉。我们的分析证实了曼陀罗属的两个属，曼陀罗属具有草本属，而布鲁格曼属具有木质属。曼陀罗进化枝由两个不同的谱系组成，即角杜鹃（D. ceratocaula）谱系，对应于单特异的锯齿菜科（Ceratocaulis），一个谱系则产生了该属的其余物种。大枝很容易分成两组，但它们与该属的常规分类不符。两组中均存在具有规则裂开荚膜果实的物种，而只有一组中存在具有不规则裂开荚膜果实的物种。由于Dutra节是多系的，因此需要按以下两个传统节对物种进行重新排列： Dutra包含D. inoxia，D。lanosa，D。metel，D。reburra和D. wrightii。种子边缘清楚地区分了这些部分，而不是先前使用的水果位置和裂开的结合。

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