黄牡丹八个居群的Giemsa C-带比较研究

应用ＢＳＧ方法对黄牡丹（Ｐａｅｏｎｉａ ｄｅｌａｖａｙｉ ｖａｒ．ｌｕｔｅａ）８个居群的Ｇｉｅｍｓａ Ｃ－带进行了比较研究。８个居群的所有染色体都在着丝点附近显示出了Ｃ－带，所有染色体的长臂上都没有显示Ｃ－带，而短臂上的Ｃ－带数量和位置在居群之间表现出了一定的差异。花甸凡居群手第二、第三、第四和第五对染色体显示端带；卓干山居群的第一、第三、第四和第五对染色体的短臂上没有显示Ｃ－带。在所研究的８个居

Giemsa C-banding Patterns in 8 Populations of Paeonia delavayi var. lutea

The C-banding patterns in 8 populations of Paeonia delavayi var. lutea were investigated by using a modified BSG technique. Each population examined here showed there were C-bands at the centromeric regions of all ten chromosomes. However, C-bands were not observed on long arms of any chromoseme. There are differences in the C-band numbers and positions in the terminal regions on the short arms. In Ludian population, C-band occupies one terminal region on the short arms of the first and 4th pairs of chromosomes respectively, which means the homologous chromosomes of the first and 4th pair of chromosomes are heterogeneous. Each population has the unique C-banding pattern except two populations of Xishan and Liangwangshan, which share the same C-banding pattern. Namely, there are 7 C-banding patterns in 8 populations examined here. The diversity of C-banding patterns indicated that the genetic diversity occurs in P. delavayi var. lutea.