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。
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.
出处
《园艺学报》
CAS
CSCD
北大核心
1997年第1期79-83,共5页
Acta Horticulturae Sinica
基金
甘肃省自然科学基金
关键词
牡丹
紫斑牡丹
核型
Paeoria rockii
Paeonia suffruticosa
Karyotype
Giemsa C banding