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Xu Bo, Chen Guang-Fu, Li Zhi-Min. Cytological study on four species of Arenaria from Qinghai-Tibet Plateau[J]. Plant Science Journal, 2020, 38(6): 723-729. DOI: 10.11913/PSJ.2095-0837.2020.60723
Citation: Xu Bo, Chen Guang-Fu, Li Zhi-Min. Cytological study on four species of Arenaria from Qinghai-Tibet Plateau[J]. Plant Science Journal, 2020, 38(6): 723-729. DOI: 10.11913/PSJ.2095-0837.2020.60723
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Cytological study on four species of Arenaria from Qinghai-Tibet Plateau

  • 1. Forestry College, Southwest Forestry University, Kunming 650224, China;

  • 2. Applied Technology College, Lijiang Normal College, Lijiang, Yunnan 674199, China;

  • 3. School of Life Science, Yunnan Normal University, Kunming 650500, China

Funds: 

This work was supported by grants from the National Natural Science Foundation of China (31460047, 31960046) and Lijiang Normal College Internship Training Base Construction Project (XJ03201801).

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  • Received Date: March 22, 2020
  • Revised Date: April 28, 2020
  • Available Online: October 31, 2022
  • Published Date: December 27, 2020
    Graphical Abstract
    • Abstract
  • To determine the cytotaxonomic characteristics of Arenaria in China, A. subgen. Eremogoneastrum A. brevipetala Y. W. Tsui et L. H. Zhou (two populations from Kangding and Daocheng in Sichuan), A. baxoiensis L. H. Zhou (two populations from Yela and Anjula mountains, Baxoi, Tibet), A. ischnophylla Williams (two populations from Damxung and Gongbo'gyamda in Tibet), and A. bryophylla Fernald (Lhasa, Tibet) were studied. Root tips were used in combination with KaryoType 2.0 analysis for karyotype research. Results showed that the chromosome number in all seven populations of the four species was 2n = 22, i.e., diploid evolution. The karyotype formula was 2n=2x=22=22 m and karyotype asymmetry belonged to Stebbins's-1A type, with an AI value in the range of 1.75 - 0.32. Thus, combined with existing cytological data for Arenaria, the karyotype of A. subgen. Eremogoneastrum is primitive, and its chromosome number (ploidy) is stable. The chromosome number and karyotype data of the four studied species are reported here for the first time. These results will supplement current cytological information for Arenaria in the Qinghai-Tibet Plateau and provide insight into the taxonomy, phylogeny, and floristic geography of Arenaria and Caryophyllaceae.
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    • References (34)
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