【摘要】 对甘肃紫斑牡丹和中原牡丹类群进行染色体核型、Ｃ带带型的系统比较，发现这２个品种群在染色体核型构成上存在差异。甘肃紫斑牡丹品种核型构成均为２ｎ＝１０＝８ｍ＋２ｓｔ；中原牡丹品种均为２ｎ＝１０＝６ｍ＋２ｓｍ＋２ｓｔ。对６个品种进行ＧｉｅｍｓａＣ带分析，发现不同品种在Ｃ带数目和分布位置上具特异性。２个品种群Ｃ带的差别主要在于第１、３对染色体短臂端带的有无。文章还讨论了紫斑牡丹的分类系统位置更多还原

【Abstract】 In this paper,comparative studies on karyotype and C banding of varieties of Paeonia rockii and those of P. suffruticosa have been first reported. Ten materials were used in karyotype analysis. The result shows that the karyotypes of P. rockii and P. suffruticosa are different. The karyotypical formulae of the five P. rockii varieties is 2n=10=8m+2st,and that of the five P. suffruticosa varieties is 2n=10=6m+2sm+2st. Six varieties were selected from the ten samples for Giemsa C banding. The terminal C bands can be observed in all samples, but there are different in number and distribution of C bands among different varieties. Comparing the C bands pattern between the varieties of P. rockii and those of P. suffruticosa ,it was found that terminal C bands in short arms of No. 1 and 3 chromosomes of the varieties of P. suffruticosa can be unexceptionlly observed while those in short arms of the same chromosomes of the varieties of P. rockii can not be observed. The experiments indicate that there exists differences in karyotypes and C bands pattern between the varieties of P. rockii and those of P. suffruticosa. Furthermore,the taxonomy systematic location of P. rockii was also disscussed.更多还原