A Multilocus Phylogeny of Daphniphyllum (Daphniphyllaceae)

IF 1.1 3区生物学 Q3 PLANT SCIENCES

Annals of the Missouri Botanical Garden Pub Date : 2022-04-20 DOI:10.3417/2022623

Mónica Tang, Chi-Chu Tsai†, Yuen-Po Yang, Chiou-Rong Sheue, Shih-Hui Liu

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引用次数: 2

Abstract

Abstract The monogeneric Daphniphyllaceae contain 36 taxa in the genus Daphniphyllum Blume that are endemic to Southeast Asia. Daphniphyllum is a morphologically homogeneous group of evergreen shrubs to trees divided into three sections: Daphniphyllum, Lunata T. C. Huang, and Staminodia Hurusawa. While the medicinal value of the Daphniphyllaceae has been explored in many studies, the understanding of their evolutionary history and infrageneric classification is still limited. To test the infrageneric classification and to examine evolutionary and classification hypotheses proposed by previous taxonomic studies, we reconstructed multilocus phylogenies by sampling 55.6% (= 20/36) of taxa in the genus based on both chloroplast (psbA-trnH spacer and trnL intron) and nuclear ITS (ITS1, 5.8S rDNA, and ITS2) regions. Our data do not support the monophyly of the three sections. Our results indicate that some hybridization events might have occurred in the evolutionary history of the genus. Moreover, our results support the classification hypotheses of D. glaucescens Blume in a strict sense but not in a broad sense. In addition, we elevate D. ×lanyuense (T. C. Huang) M. S. Tang, S. H. Liu & Yuen P. Yang, stat. nov., from varietal rank to species based on our results. Two putative natural hybrids, D. ×lanyuense and D. teijsmannii Zoll. ex Teijsm. & Binn., and their putative parental taxa are also revealed in our study. In sum, our results shed new insights into the sectional scope and understanding of evolutionary relationships among taxa in Daphniphyllum.

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水蚤科多孔系统发育

摘要瑞香科瑞香属植物包含36个分类群，为东南亚特有植物。Daphiphyllum是一组形态均匀的常绿灌木到树木，分为三个部分：Daphiphillum、Lunata T.C.Huang和Staminodia Hurusawa。尽管许多研究已经探索了瑞香科的药用价值，但对其进化史和亚属分类的了解仍然有限。为了检验亚属分类，并检验先前分类学研究提出的进化和分类假设，我们通过基于叶绿体（psbA-trnH间隔子和trnL内含子）和核ITS（ITS1、5.8S rDNA和ITS2）区域对该属55.6%（=20/36）的分类群进行采样，重建了多点系统发育。我们的数据不支持这三个部分的单系性。我们的研究结果表明，一些杂交事件可能发生在该属的进化史上。此外，我们的结果在严格意义上支持了D.glacescens Blume的分类假设，但在广义上不支持。此外，根据我们的研究结果，我们将兰越塞（黄天祥）唐、刘和杨从品种等级提升到品种等级。两个假定的天然杂交种，D.×lanyuense和D.teijsmanni-Zoll。前帝制。&Binn。，在我们的研究中还揭示了它们假定的亲本分类群。总之，我们的研究结果为Daphiphyllum分类群之间的分区范围和进化关系的理解提供了新的见解。

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来源期刊

Annals of the Missouri Botanical Garden 生物-植物科学

CiteScore

3.60

自引率

0.00%

发文量

期刊介绍： The Annals of the Missouri Botanical Garden is a quarterly international journal primarily devoted to systematic botany and evolutionary biology. We encourage submissions of original papers dealing with significant advances in the taxonomy, phylogeny, biogeography, paleobiology, and evolution of plants, and in conservation genetics and biology, restoration ecology, and ethnobiology, using morphological and/or molecular characters, field observations, and/or database information. We also welcome reviews and papers on conceptual issues and new methodologies in systematics. Important floristic works will also be considered. Symposium proceedings discussing a broader range of topical biological subjects are also published, typically once a year. All manuscripts are peer-reviewed by qualified and independent reviewers.