植物分类学报

• 研究论文 • 上一篇    下一篇

四川牡丹和块根芍药第五号染色体异常的减数分裂证据

1 2王士泉; 1张大明*   

  1. 1(系统与进化植物学国家重点实验室, 中国科学院植物研究所 北京 l00093)
    2(中国科学院研究生院 北京 l00049)
  • 收稿日期:2006-05-15 修回日期:2007-11-21 出版日期:2008-03-18 发布日期:2008-03-18
  • 通讯作者: 张大明 E-mail:zhangdm@ibcas.ac.cn

Meiotic abnormalities of the fifth pair of chromosomes in Paeonia decomposita and P. intermedia

1 2Shi-Quan WANG; Da-Ming ZHANG*   

  1. 1(State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing l00093, China)
    2(Graduate University of Chinese Academy of Sciences, Beijing l00049, China)
  • Received:2006-05-15 Revised:2007-11-21 Online:2008-03-18 Published:2008-03-18
  • Contact: Da-Ming ZHANG< E-mail:zhangdm@ibcas.ac.cn

摘要:

Abstract: This study revealed that there were common meiotic abnormalities on the fifth pair of chromosomes in Paeonia decomposita and P. intermedia. Short arms had a tremendous deviation between genetic distance and physical distance, when compared with the long arms. The genetic distance of the short arm was about a twenty-eighth (P. intermedia) and fiftieth (P. decomposita) of the long arm, whereas the physical distance was about one third of the long arm and the physical distance was over nine times longer than the genetic distance. In P. decomposita, the ratio between ring bivalents (both arms formed chiasma) and rod bivalents (only one arm formed chiasma) was 1.94 : 98.06, whereas in P. intermedia the ratio was 3.42 : 96.58. In both of the species, rod bivalents were much more than ring bivalents. Occurrence frequency of anaphase I bridges was low in P. decom-posita and P. intermedia, and the length of fragments varied in a range.

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