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Plant Diversity ›› 2011, Vol. 33 ›› Issue (2): 164-170.DOI: 10.3724/SP.J.1143.2011.10178

• 研究论文 • 上一篇    下一篇



  1. 云南师范大学生命科学学院,云南 昆明  650092
  • 收稿日期:2010-10-19 出版日期:2011-04-25 发布日期:2011-02-15
  • 基金资助:

    国家自然科学基金项目(40930209, 30770167),云南省重点项目 (2008CC013),科技部基础平台专项重点项目(2007FY110100)。云南省教育厅省级精品课程项目

A Karyological Study of Piptanthus (Leguminosae) from Sino-Himalayas

 LIU  Qin-Yu, WANG  Xin-Jiang, ZHANG  Yong-Zeng, LI  Zhi-Min   

  1. Life Science School, Yunnan Normal University, Kunming 650092, China
  • Received:2010-10-19 Online:2011-04-25 Published:2011-02-15




关键词: 黄花木属, 居群, 核型, 进化


 The karyology of 5 populations, all two species of Piptanthus (P.nepalensis and P.tomentosus) from Sino-Himalayas were studied in this paper, of which chromosome number and the karyotype of P.tomentosus was firstly reported. The results show that both species P.nepalensis and P.tomentosus share the same chromosome basic number x=9 and 2n=18, all of them are diploids. Statistical analyses show that there are evidently differences of karyotypes between the two species, that is, P.nepalensis belong to the 1A type, and P.tomentosus is the 2A type. In addition, there are some differences in karyotype among populations in P.nepalensis as well. These results are consistent with the anterior hypothesis by systematic and biogeography that P.tomentosus (with 2A) was resulted from the expansion and differentiation of P.nepalensis (with 1A ) from west to east during the himalaya uplift.

Key words:  Piptanthus, Population, Karyotype, Evolution