Plant Diversity ›› 2007, Vol. 29 ›› Issue (04): 429-433.

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Studies on Karyotypes of Five Populations of Rheum tanguticum (Polygonaceae)

HU Yan-Ping1 , 2 , XIE Xiao-Long1 , 2 , WEN Quan3 , ZHAO Xu-Dong1 , 2 , WANG Li1 , LI Yi1   

  1. 1 Northwest Institute of Plateau Biology , Chinese Academy of Sciences , Xining 810001 , China;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100049 , China ;
    3 Qinghai Huangchuan Middle School , Xining 810008 , China
  • Received:2006-10-27 Online:2007-08-25 Published:2007-08-25
  • Contact: LI Yi

Abstract: The chromosome numbers and karyotypes of Rheum tanguticum in 5 populations were firstly reported in this paper. The results are as follows: karyotype formulae of DW, KQ and DK populations are all 2n = 2x = 22 = 2sm + 20m; JK population is 2n = 2x = 22 = 20m+ 2M; SP population is 2n = 2x = 22 = 2sm + 18m+ 2M . The karyotypes of DW, KQ and JK populations belong to 1A type while DK and SP populations belong to 2A type . The result of Q cluster analysis of five populations shows that the karyotypes of 5 populations differentiate in some degree , which may be caused by different habitats .

Key words: Rheum tanguticum

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