塑料数据揭示了天竺葵科植物的系统发育、生物地理和性状演化

IF 3.7 1区 生物学 Q1 Agricultural and Biological Sciences
Xiao-Ying Liu, Dan-Qing Zhang, Jian-Qiang Zhang
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引用次数: 0

摘要

石楠科是被子植物的一个中等大小的科,大多数属草本多肉植物,通常有5瓣花和一或两轮雄蕊。虽然以前的系统发育研究揭示了天竺葵科的七个主要“枝”,并大大提高了我们对天竺葵家族进化史的理解,但主要枝之间的关系仍然存在争议。此外,划分次家族分类群的重要形态特征的生物地理起源和演化尚未得到基于系统发育主干的正式生物地理和特征演化分析。在这项研究中,我们使用了52个物种的塑性数据,代表了以前研究中发现的所有主要分支,重建了一个稳健的天竺葵科系统发育,并在此基础上揭示了天竺葵科多样化的时空框架。我们发现这个家族可能起源于非洲南部,然后分散到地中海,从那里到东亚、马卡罗尼西亚和北美。在白垩纪-古近纪(K-Pg)界线之后不久,天竺葵科的树冠年龄约为6393万年前。我们还追踪了以前用于划分亚家族分类群的六个重要形态特征的进化,并证明了营养(生命形式和叶状性)和花特征(雄蕊轮生数,花瓣自由或融合,花分生)的广泛平行和趋同进化。我们的研究结果为进一步的研究提供了坚实的骨干系统发育基础,也为进一步了解天竺葵科植物的生物地理学和进化提供了一些重要的新见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Plastomic data shed new light on the phylogeny, biogeography, and character evolution of the family Crassulaceae

Plastomic data shed new light on the phylogeny, biogeography, and character evolution of the family Crassulaceae

Crassulaceae is a mid-sized family of angiosperms, most species of which are herbaceous succulents, usually with 5-merous flowers and one or two whorls of stamens. Although previous phylogenetic studies revealed seven major “clades” in Crassulaceae and greatly improved our understanding of the evolutionary history of the family, relationships among major clades are still contentious. In addition, the biogeographic origin and evolution of important morphological characters delimiting infrafamilial taxa have not been subject to formal biogeographic and character evolution analyses based on a well-supported phylogeny backbone. In this study, we used plastomic data of 52 species, representing all major clades revealed in previous studies to reconstruct a robust phylogeny of Crassulaceae, based on which we unraveled the spatiotemporal framework of diversification of the family. We found that the family may originate in southern Africa and then dispersed to the Mediterranean, from there to eastern Asia, Macaronesia, and North America. The crown age of Crassulaceae was dated at ca. 63.93 million years ago, shortly after the Cretaceous–Paleogene (K-Pg) boundary. We also traced the evolution of six important morphological characters previously used to delimit infrafamilial taxa and demonstrated widespread parallel and convergent evolution of both vegetative (life form and phyllotaxis) and floral characters (number of stamen whorls, petals free or fused, and flower merism). Our results provide a robust backbone phylogeny as a foundation for further investigations, and also some important new insights into biogeography and evolution of the family Crassulaceae.

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来源期刊
Journal of Systematics and Evolution
Journal of Systematics and Evolution Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
7.40
自引率
8.10%
发文量
1368
审稿时长
6-12 weeks
期刊介绍: Journal of Systematics and Evolution (JSE, since 2008; formerly Acta Phytotaxonomica Sinica) is a plant-based international journal newly dedicated to the description and understanding of the biological diversity. It covers: description of new taxa, monographic revision, phylogenetics, molecular evolution and genome evolution, evolutionary developmental biology, evolutionary ecology, population biology, conservation biology, biogeography, paleobiology, evolutionary theories, and related subjects.
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