【摘要】 用G-显带法对4种不同地理来源的普通野生稻(Oryza rufipogon Griff.)的染色体核型和G-显带带型作了比较。供试材料间在染色体臂长、臂比、每条染色体臂的G-带数目以及带纹大小和着色深浅等带型特征方面均表现出明显的多态性。某些染色体的单个G-带大小和着色深浅具有异态性。讨论了核型多态形成的机制等问题。更多还原

【Abstract】 The karyotypes and G-banding patterns of four kinds of experimental materials collected from different geographic regions were compared in Oryza rufipogon Griff. There were obvious polymorphisms in chromosome arm length, arm ratio, G-band number of each arm as well as the size and degree of G-bands staining among the experimental materials. The single band of some chromosomes is heteromorphic in the size and staining intensity. The mechanisms of karyotype polymorphism formation is also discussed.更多还原