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Plant Diversity ›› 1997, Vol. 19 ›› Issue (04): 1-3.

• 研究论文 •    

滇牡丹复合群的 Giemsa C-带比较研究

肖调江;龚询;夏丽芳;C.Bruce Christie   

  1. 中国科学院昆明植物研究所,昆明650204
  • 出版日期:1997-08-25 发布日期:1997-08-25

C BANDING PATTERNS IN PAEONIA DELAVAYI COMPLEX OF GENUS PAEONIA

Xiao Tiaojiang, Gong Xun, Xia Lifang, C. Bruce Christie   

  1. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204;Department of Plant Science, Massey University, Palmerston North, New Zealand
  • Online:1997-08-25 Published:1997-08-25

摘要: 应用 BSG方法对滇牡丹(Paeonia delavayi)复合群 5个类群的 Giemsa C一带进行了比较研究。在5个类群的根尖体细胞有丝分裂中期观察到川条染色体,其核型基本一致,均为K=2n=10=6m+2sm+2st。各类群的 10条染色体都在着丝点附近显示出了 Giemsa C-带,所有染色体的长臂上都没有显示出 Giemsa C-带,而短臂上的 Giemsa C-带的数量和位置在类群之间表现了一定的差异。除了滇牡丹第一对同源染色体中只有一条的短臂上显示出了Giemsa C-带而表现出了异染色质的杂合性外,其余各类群每一对同源染色体都显示了相同的Giemsa C-带。每一类群所含的C-带比率C-带总长度/染色体总长度)非常接近,约为10%。文中还对其形态性状进行了分析。作者认为滇牡丹复合群5个类群的关系非常密切,可能是由同一祖先演化而来的。

关键词: 滇牡丹复合群, 染色体, Giemsa C-带

Abstract: The C banding patterns of five taxa of Paeonia delavayi complex from Yunnan prov- ince in China were analyzed using a modified BSG technique. Each taxon (species or variety or form) examined had a unique C-banding pattern with some common features present in each taxon. All taxa examined were diploid with 2n= 10. Each taxon showed C-bands at the centromeric regions and no C-band at the long arms of all ten chromosomes. There were differ-ences in the C-banding numbers and positions at the terminal regions of the short arms. The aver-age ratio of C-band length to total chromosome length in each taxon was approximately 10% as found in P.delavayi. These results suggest that the five taxa of P.delavayi complex are closely re-lated and may have a common ancestor.

Key words: Paeonia delavayi complex