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Climate heterogeneity shapes phylogeographic pattern of Hippophae gyantsensis (Elaeagnaceae) in the East Himalaya-Hengduan Mountains
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  • Ting Xu,
  • Ruixue Wang,
  • La Qiong,
  • Takahiro Yonezawa,
  • Xinyi Huang,
  • Sun Kun,
  • Zhiping Song,
  • Yuguo Wang,
  • Igor Bartish,
  • Wenju Zhang,
  • Shanmei Cheng
Ting Xu
Fudan University School of Life Sciences
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Ruixue Wang
Northwest Normal University
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La Qiong
Tibet University
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Takahiro Yonezawa
Fudan University
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Xinyi Huang
Fudan University School of Life Sciences
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Sun Kun
College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, China
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Zhiping Song
Fudan University
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Yuguo Wang
Fudan University
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Igor Bartish
Institute of Botany ASCR
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Wenju Zhang
Fudan University
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Shanmei Cheng
Jiangxi Agricultural University

Corresponding Author:[email protected]

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The interaction of recent orographic uplift and climate heterogeneity acted as a key role in the East Himalaya-Hengduan Mountains (EHHM) has been reported in many studies. However, how exactly the interaction promotes clade diversification remains poorly understood. Here, we both studied genetic structure of the chloroplast trnT-trnF region and 11 nuclear microsatellite loci in Hippophae gyantsensis and examined what role geological barriers or ecological factors play in the spatial genetic structure. The results showed that this species had a strong east-west phylogeographic structure, with several mixed populations identified from microsatellite data in central location. The intraspecies divergence time was estimated to about 3.59 Ma, corresponding well with the recent uplift of the Tibetan Plateau. Between the two lineages there was significant climatic differentiation without geographic barriers. High consistency between lineage divergence, climatic heterogeneity and Qingzang Movement demonstrated that climatic heterogeneity but not geographic isolation drives the divergence of H. gyantsensis, and the recent regional uplift of the QTP, as the Himalayas, create heterogeneous climates by affecting the flow of the Indian monsoon. The east group of H. gyantsensis experienced population expansion c. 0.12 Ma, closely associated with the last interglacial interval. Subsequently, a genetic admixture event between east and west groups happened at 26.90 ka, a period corresponding to the warm inter-glaciation again. These findings highlight the importance of the Quaternary climatic fluctuations in the recent evolutionary history of H. gyantsensis. Our study will improve the understanding of the history and mechanisms of biodiversity accumulation in the EHHM region.
10 Feb 2023Submitted to Ecology and Evolution
13 Feb 2023Submission Checks Completed
13 Feb 2023Assigned to Editor
17 Feb 2023Reviewer(s) Assigned
30 Mar 2023Review(s) Completed, Editorial Evaluation Pending
03 Apr 2023Editorial Decision: Revise Minor
15 May 20231st Revision Received
26 May 2023Submission Checks Completed
26 May 2023Assigned to Editor
26 May 2023Review(s) Completed, Editorial Evaluation Pending
29 May 2023Editorial Decision: Accept