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Phylogenomics of the aquatic plant genus Ottelia (Hydrocharitaceae): Implications for historical biogeography.

Authors
  • Li, Zhi-Zhong1
  • Lehtonen, Samuli2
  • Martins, Karina3
  • Gichira, Andrew W4
  • Wu, Shuang5
  • Li, Wei6
  • Hu, Guang-Wan7
  • Liu, Yan8
  • Zou, Chun-Yu8
  • Wang, Qing-Feng7
  • Chen, Jin-Ming9
  • 1 CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China. , (China)
  • 2 Herbarium, Biodiversity Unit, University of Turku, Turku 20014, Finland. , (Finland)
  • 3 Departamento de Biologia, Universidade Federal de São Carlos, Sorocaba 18052-780, Brazil. , (Brazil)
  • 4 CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. , (China)
  • 5 Guangxi Association for Science and Technology, Nanning 530022, China. , (China)
  • 6 CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China. , (China)
  • 7 CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. , (China)
  • 8 Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin 541006, China. , (China)
  • 9 CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Molecular Phylogenetics and Evolution
Publisher
Elsevier
Publication Date
Aug 11, 2020
Volume
152
Pages
106939–106939
Identifiers
DOI: 10.1016/j.ympev.2020.106939
PMID: 32791299
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Ottelia Pers. is the second largest genus of the family Hydrocharitaceae, including approximately 23 extant species. The genus exhibits a diversity of both bisexual and unisexual flowers, and complex reproductive system comprising cross-pollinated to cleistogamous flowers. Ottelia has been regarded as a pivotal group to study the evolution of Hydrocharitaceae, but the phylogenic relationships and evolutionary history of the genus remain unresolved. Here, we reconstructed a robust phylogenetic framework for Ottelia using 40 newly assembled complete plastomes. Our results resolved Ottelia as a monophyletic genus consisting of two major clades, which correspond to the main two centers of diversity in Asia and Africa. According to the divergence time estimation analysis, the crown group Ottelia began to diversify around 13.09 Ma during the middle Miocene. The biogeographical analysis indicated the existence of the most recent common ancestor somewhere in Africa/Australasia/Asia. Basing on further insights from the morphological evolution of Ottelia, we hypothesized that the ancestral center of origin was in Africa, from where the range expanded by transoceanic dispersal to South America and Australasia, and further from Australasia to Asia. We suggested that the climatic change and global cooling since the mid-Miocene, such as the development of East Asian monsoon climate and tectonic movement of the Yunnan-Guizhou Plateau (YGP), might have played a crucial role in the evolution of Ottelia in China. Copyright © 2020 Elsevier Inc. All rights reserved.

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