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Fu Peng-Cheng, Tan Jing-Zhou, Wang Hong-Yu, Sun Shan-Shan. Genetic divergence and demographic history of Gentiana hexaphylla Maximowicz ex Kusnezow complex (Gentianaceae) in Hengduan Mountains[J]. Plant Science Journal, 2020, 38(3): 390-399. DOI: 10.11913/PSJ.2095-0837.2020.30390
Citation: Fu Peng-Cheng, Tan Jing-Zhou, Wang Hong-Yu, Sun Shan-Shan. Genetic divergence and demographic history of Gentiana hexaphylla Maximowicz ex Kusnezow complex (Gentianaceae) in Hengduan Mountains[J]. Plant Science Journal, 2020, 38(3): 390-399. DOI: 10.11913/PSJ.2095-0837.2020.30390
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Genetic divergence and demographic history of Gentiana hexaphylla Maximowicz ex Kusnezow complex (Gentianaceae) in Hengduan Mountains

  • College of Life Science, Luoyang Normal University, Luoyang, Henan 471934, China

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This work was supported by grants from the National Natural Science Foundation of China (31600296) and Foundation of Henan Provincial Youth Backbone Teachers.

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  • Received Date: October 09, 2019
  • Revised Date: December 16, 2019
  • Available Online: October 31, 2022
  • Published Date: June 27, 2020
    Graphical Abstract
    • Abstract
  • The Hengduan Mountains are a global biodiversity center and hotspot of plant evolution research. Being endemic to the Hengduan Mountains, Gentiana hexaphylla Maximowicz ex Kusnezow shows continuous morphological characters with many of its closely related species. In this study, 21 populations were sampled to distinguish the G. hexaphylla complex through key morphological characters at the population level, and to explore genetic divergence and demographic history based on one chloroplast fragment. The number of haplotypes, average haplotype diversity, nucleotide diversity, and genetic diversity index(Pi) were 0.444, 0.00732, and 3.73, respectively, indicating high genetic diversity in the complex. Haplotypes were rarely shared among populations and most genetic variation occurred among populations (72.74%) rather than within populations (27.26%). Bayesian analysis indicated that genetic divergence in the complex occurred within the last two million years. Mismatch distribution and neutrality tests consistently showed that the G. hexaphylla complex has not experienced significant population expansion recently. In conclusion, genetic divergence within the G. hexaphylla complex has been shaped by climatic and environmental changes during the Quaternary as well as by geological isolation in the Hengduan Mountains.
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    • References (45)
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