Comparative phylogeography of Acanthocalyx (Caprifoliaceae) reveals distinct genetic structures in the Himalaya–Hengduan Mountains

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Qi-Yong Mu, Chih-Chieh Yu, Yan Wang, Ting-Shen Han, Hui Wang, Wen-Na Ding, Qiu-Yue Zhang, Shook Ling Low, Quan-Jing Zheng, Chuan Peng, Zheng-Yan Hu, Yao-Wu Xing
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引用次数: 2

Abstract

The Himalaya–Hengduan Mountain (HHM) region consists of two global biodiversity hotspots characterized by a high degree of plant endemism. However, little is known about how these endemic species are formed and maintained in relation to the regional geomorphology of the past or current time. Thus, this study investigated the genetic structure of the herbaceous genus Acanthocalyx (Caprifoliaceae) endemic to the HHM to demonstrate if major geographic or ecological barriers in the HHM region have influenced its phylogeographic patterns. Our analyses revealed distinct genetic structures within A. alba and A. nepalensis and indicated that A. delavayi may have recently evolved from isolated peripheral populations of A. nepalensis. In particular, we not only confirmed a well-known genetic structure of alpine plants between the Himalayas and the Hengduan Mountains but also discovered a notable floristic boundary (bounded by 30° to 31°N latitude) within the Hengduan Mountains from A. alba. This study provides new insights into the dispersal and intraspecific genetic variation of Acanthocalyx and highlights the importance of geomorphological features for the diversification of HHM alpine flora.

Abstract Image

喜马拉雅-横断山区金盏花的比较系统地理揭示了不同的遗传结构
喜马拉雅-横断山地区由两个全球生物多样性热点组成,具有高度的植物特有性。然而,关于这些特有物种是如何与过去或当前的区域地貌形成和维持的,人们知之甚少。因此,本研究调查了HHM特有的草本属金盏花(Caprifoliaceae)的遗传结构,以证明HHM地区的主要地理或生态障碍是否影响了其系统地理模式。我们的分析揭示了A.alba和A.nepalensis内部不同的遗传结构,并表明A.delavayi可能是最近从分离的A.nepalenis外围种群进化而来的。特别是,我们不仅证实了喜马拉雅山脉和横断山脉之间高山植物的一个众所周知的遗传结构,而且在横断山脉内发现了一个显著的区系边界(以北纬30°至31°为界)。这项研究为棘茄的扩散和种内遗传变异提供了新的见解,并强调了地貌特征对HHM高山植物群多样化的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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