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Plant Diversity ›› 2001, Vol. 23 ›› Issue (02): 1-3.

• 研究论文 •    

7种橐吾属植物的核型

龚洵 顾志建 鲁元学 张长芹    

  1. 中国科学院昆明植物研究所
  • 出版日期:2001-04-25 发布日期:2001-04-25

The Karyotypes of Seven Species in Ligularia

GONG Xun GU Zhi-Jian LU Yuan-Xue ZHANG Chang-Qin   

  1. Kunming Institute of Botany, Chinese Academy of Sciences
  • Online:2001-04-25 Published:2001-04-25

摘要: 研究了7种橐吾属(Ligularia)植物的染色体和核形态.干崖子橐吾(L.kanaitzensis)的核型为2n=2x=58=26m+28sm+4st;窄头橐吾(L.stenocephala)的核型为2n=2x=58=26m+32sm;细茎橐吾(L.hookeri)的核型为2n=2x=58=30m+26sm+2st;宽戟橐吾(L.latihastata)的核型为2n=2x=58=28m+26sm(2sat)+4st;网脉橐吾(L.dictyoneura)的核型为2n=2x=58=26m+28sm+2st+2t;鹿蹄橐吾(L.hodgsonii)的核型为2n=2x=58=28m+28sm+2t;棉毛橐吾(L.vellerea)的核型为2n=2x=58=22m+34sm+2st.虽然这7个种的染色体数目相同,2n=58,核型主要由m和sm染色体构成,但各类的染色体数目在种间有差异.核型的对称性高,着丝点端化值(T.C)为61.45%~64.96%.除窄头橐吾和鹿蹄橐吾的染色体数与前人报道的相同外,其它5个种的染色体数目和核型均为首次报道.

关键词: 橐吾属, 染色体数目, 核型

Abstract: The chromosome numbers and karyotypes of 7 species in Ligularia are reported in this paper. The results are as follows: 2n=-2x=58=28sm+4st for L.kanaitszienis; 2n=2x=58=26m+32sm for L.stenocephala; 2n=2x=58=26m+32sm for L.stenocephala; 2n=2x=58=26sm+2st for L.hookeri; 2n=2x=58=28m+26sm(2sat)+4st for L.latihastata; 2n=2x=58=26m+28sm+2st+2t for L.dictyoneura

Key words: Ligularia