草芍药、野牡丹和黄牡丹的核型研究

KARYOTYPIC STUDIES OF PAEONIA OBOVATA,P.DELAVAYI AND P. DELAVAYI VAR. LUTEA

本文报道了国产芍药属(Paeonia L.)植物草芍药、野牡丹和黄牡丹的染色体数目及核型,均为2n=10=6m+2sm+2st,它们分别具2、3和4对次缢痕,所具次缢痕的数目和位置可以作三种核型的区别特征。

The precent paper reports the chromosome numbers and karyotype analysis of Paeonia obovata Maxim., P. delavayi Franch. and P. delavayi Franch. var. lutea Finet et Gagnep., which were collected from Jiangxi and Yunnan Province of China. On the chromosomes of these species, it is show a similarity that the somatic chrosome number of all species are 2n=10, their karyotype formulae are 2n= 6 m + 2sm+ 2st. In these species, however, each species may be distinguished from anothers by number and position of secondary constriction. The P. obovata has two pairs of SAT-chromosome, the secondary constriction are on the short arm near terminal of 4th and 5th pairs. The SAT-chromosome of P. delavayi and P.delavayi var. lutea both have 3 pairs. 4th and 5th pairs of these as similar as P. obovata. But there is one secondary constriction on the long arm near centromere of 1st pair of P .delavayi, one on the long arm near centromere and another on the short arm near terminal of 2 nd pair of P. delavayi var. lutea.