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Genomic effects of population collapse in a critically endangered ironwood tree Ostrya rehderiana

Author

Listed:
  • Yongzhi Yang

    (Sichuan University
    Lanzhou University)

  • Tao Ma

    (Sichuan University)

  • Zefu Wang

    (Sichuan University)

  • Zhiqiang Lu

    (Lanzhou University)

  • Ying Li

    (Lanzhou University)

  • Chengxin Fu

    (Zhejiang University)

  • Xiaoyong Chen

    (East China Normal University)

  • Mingshui Zhao

    (Zhejiang Tianmushan National Nature Reserve Management Bureau)

  • Matthew S. Olson

    (Texas Tech University)

  • Jianquan Liu

    (Sichuan University
    Lanzhou University)

Abstract

Increased human activity and climate change are driving numerous tree species to endangered status, and in the worst cases extinction. Here we examine the genomic signatures of the critically endangered ironwood tree Ostrya rehderiana and its widespread congener O. chinensis. Both species have similar demographic histories prior to the Last Glacial Maximum (LGM); however, the effective population size of O. rehderiana continued to decrease through the last 10,000 years, whereas O. chinensis recovered to Pre-LGM numbers. O. rehderiana accumulated more deleterious mutations, but purged more severely deleterious recessive variations than in O. chinensis. This purging and the gradually reduced inbreeding depression together may have mitigated extinction and contributed to the possible future survival of the outcrossing O. rehderiana. Our findings provide critical insights into the evolutionary history of population collapse and the potential for future recovery of the endangered trees.

Suggested Citation

  • Yongzhi Yang & Tao Ma & Zefu Wang & Zhiqiang Lu & Ying Li & Chengxin Fu & Xiaoyong Chen & Mingshui Zhao & Matthew S. Olson & Jianquan Liu, 2018. "Genomic effects of population collapse in a critically endangered ironwood tree Ostrya rehderiana," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07913-4
    DOI: 10.1038/s41467-018-07913-4
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    Cited by:

    1. Rong Wang & Chao-Nan Liu & Simon T. Segar & Yu-Ting Jiang & Kai-Jian Zhang & Kai Jiang & Gang Wang & Jing Cai & Lu-Fan Chen & Shan Chen & Jing Cheng & Stephen G. Compton & Jun-Yin Deng & Yuan-Yuan Din, 2024. "Dipterocarpoidae genomics reveal their demography and adaptations to Asian rainforests," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    2. Zefu Wang & Minghui Kang & Jialiang Li & Zhiyang Zhang & Yufei Wang & Chunlin Chen & Yongzhi Yang & Jianquan Liu, 2022. "Genomic evidence for homoploid hybrid speciation between ancestors of two different genera," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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