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Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (4): 565-573.doi: 10.7525/j.issn.1673-5102.2022.04.006

• Systematic and Evolutionary • Previous Articles     Next Articles

Phylogeography of Xanthopappus subacaulis(Asteraceae), an Endemic Species from the Northeastern of the Qinghai-Tibet Plateau

Yang ZHANG1,2, Zilan MA3, Shanshan XU1, Xu SU3(), Meiying LI3   

  1. 1.Natural History Research Center,Shanghai Natural History Museum,Branch of Shanghai Science & Technology Museum,Shanghai 200041
    2.Jing’an Association for Science & Technology,Shanghai 200040
    3.School of Life Science,Qinghai Normal University,Xining 810008
  • Received:2021-06-23 Online:2022-07-20 Published:2022-07-15
  • Contact: Xu SU E-mail:xusu8527972@126.com
  • About author:ZHANG Yang(1986—),male,assistant researcher,engaged in plant phylogeography.
  • Supported by:
    Under the auspices of the National Natural Science Foundation of China(31800310);Key Laboratory of Medicinal Animal and Plant Resources of the Qinghai-Tibet Plateau in Qinghai Province(2020-ZJ-Y40);Science and Technology Innovation Project of Undergraduate from Qinghai Normal University in 2021(QHNU-2021-029)


Xanthopappus subacaulis is an endemic medicinal plant growing in the alpine meadow of the Qinghai-Tibet Plateau(QTP). To explore the influence of Quaternary climatic oscillations on the population genetic structure and distribution pattern of X. subacaulis, 3 chloroplast DNA fragments(psbA-trnHrbcL and psbI-psbK) from 123 individuals of 20 populations were sequenced and analyzed respectively in the present study. The results showed that 6 haplotypes were detected in X. subacaulis, among which H1 was an ancient haplotype. All populations of X. subacaulis had haplotype H1 except for P7. H3, H5 and H6 were private haplotypes, among which H3 was a private haplotype of population P7, and H5 and H6 only existed in P18. H2 and H4 were mainly distributed in the population of Qinghai Lake basin. The total genetic diversity(He) and nucleotide diversity(π) were 3.101 and 0.008 903, respectively. The genetic variation among populations(68.98%) was higher than that within populations(31.02%), and the genetic differentiation among populations was relatively higher(FST=0.689 85,P<0.01). The genetic differentiation coefficient NST of populations(0.727) was higher than that of GST(0.656)(P>0.05), which indicated that there was no obvious phylogeographical structure in the sampling regions. The results of mismatch distributions and neutrality tests revealed that the population of X. subacaulis might have experienced recent expansion. Therefore, the study suggests there are micro-sanctuaries in Qinghai Lake basin of Qinghai Province and Lintan region of Gansu Province during the Quaternary glaciations, and suggests that the Quaternary climate change and QTP uplift shape the modern geographical distribution pattern of X. subacaulis.

Key words: Xanthopappus subacaulis, genetic structure, dynamic history, chloroplast DNA, Qinghai-Tibet Plateau

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