An idiogram on pachytene bivalents with high resolution multiple bands of zebrafish(Danio rerio)

Well spread pachytene bivalents with high-resolution multiple bands of zebrafish were obtained after the testes were treated with alkaline hypotonic solution and high chloroform fixative solution. This might be the pattern with the largest number of multiple bands obtained from fish chromosomes so far published. Both the number and character of the bands in each bivalent were stable. According to the principles of ISCN (1978) and ISCN (1981), an idiogram of 599 bands was set up, and the detailed description of the landmark system and the band positions were given.

斑马鱼二价体制备与多重带显带的方法学探讨

采用碱性低渗结合高氯仿一步显带技术获得了斑马鱼二价体高分辨多重G带 ,所出现的带纹丰富 ,反差明显。采用地高辛为标记的以限制性内切酶AluⅠ介导的原位切口平移技术使斑马鱼二价体上呈现出类G带的多重带 ,获得了明暗反差强烈的带纹结果。通过比较多个不同分裂相的多条染色体 ,发现带纹的分布具明显特征性 ,并且特征一致 ,带纹数目基本吻合。首次从方法学上对斑马鱼二价体的制备过程及多重带显带技术进行了分析、探讨和总结 ,力求将该技术程序化、系统化 ,使其具有可重复性和可操作性 ,并对显带的可能机理进行了讨论。