遗传 ›› 1995, Vol. 17 ›› Issue (3): 3-6.

• 论文 • 上一篇    下一篇

正常人各年龄组染色体着丝粒点(Cd)研究

翁亚光; 王应雄; 张湘蜀; 吴春英; 郑增淳 WENG Ya-Guang;WANG Ying-Xiong;ZHANG Xiang-Shu;WU Chun-Ying;ZHENG Zeng-Chun   

  1. 重庆医科大学遗传优生教研室, 重庆 630046 Department of Genetics,Chongqing University of Medical Sciences,Chongqing 630046
  • 收稿日期:1900-01-01 出版日期:1995-06-10 发布日期:1995-06-10

The Variation in Centromeric Dots (Cd) of Human Chromosome in Different Ages

  • Received:1900-01-01 Online:1995-06-10 Published:1995-06-10

摘要: 本文运用本室改良的Cd-NOR银染技术对80例4个年龄组的正常中国人的Cd变化进行了较系统的研究, 结果表明:(1)正常人随年龄增加,Cd消失的频率、Cd变异及Cd-NOR融合频率也相应增加,特别是Ⅲ、Ⅳ组(中、老年组)增加的频率尤为显著;(2)首次对Cd消失的过程提出了独特的观点,即Cd消失首先表现为Cd变小, 随着变小程度的加大,最终导致Cd消失;(3)在本研究中首次观察到单个Cd的现象,作者认为是细胞分裂中期染色体着丝一分为二的延迟现象。各年龄组间单Cd出现频率无统计学差异,同一年龄组中,2号染色体和1号染色体上单Cd出现频率显著高于理论值;(4)随年龄增高,Cd各项观察值的增高在男性与女性间未见明显的差异。
Abstract:The Cd variation of human chromosome in four groups of different age has been investigated.The result shows that the frequencies of Cd disappearing,size variation and Cd-NOR fusion increased with the age rising,especially in the group of aged people.We suggest that the variation of Cd shows the size changes first,and then disappears completely.We also observed some cells in which a few chromosomes shows only a single Cd in centromeric region.Cd variation in different age groups has no significant difference between the male and the female.

关键词: 染色体不分离, Cd带
Key words,
Human chromosome, Centromeric dots(kinetochore), 相关机率, DNA指纹图, 荧光素标记, JH12.6探针, 平均等位基因频率

Key words: Fluoescein (F1-11-dUTP) labelling, Mean allelic frequency, Probe JH12.6, DNA fingerprints, Probability of chance association