摘要
应用BSG方法对黄牡丹( Paeonia delavayivar.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。花甸坝居群的第二、第三、第四和第五对染色体显示了端带; 卓干山居群的第一、第三、第四和第五对染色体的短臂端显示了C- 带。在所研究的8 个居群中, 这两个居群的端部C- 带最多。而翁水居群的短臂上没有显示C- 带, 但第三和第五对染色体的短臂上有随体, 且第五对染色体上的随体显示出了C- 带, 是8 个居群中端部C- 带最少的。土官村居群的第三、第四和第五对染色体的短臂端部显示出了C- 带。鲁甸居群的第二和第五对染色体的短臂端部显示出了C-带, 且第一和第四对染色体各有一条染色体的短臂端部显示出了C- 带, 表现出了异染色质的杂合性。尼西居群的第一、第三和第五对染色体的短臂上显示出了端带。西山居群和梁王居群的C- 带式样完全相同, 第四和第五对染色体的短臂端部显示出了C- 带。8 个居群的Giemsa C- 带式样各不相同, 这种居群水平上的C-
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.
出处
《云南植物研究》
CSCD
1999年第4期477-482,共6页
Acta Botanica Yunnanica