摘要
利用醋酸洋红 Giemsa—C 显带技术对香雪兰根尖细胞的染色体进行了显带研究。经过处理的染色体在前期和中期呈现各种较典型的 C 带带型,如端带、着丝点带和中间带,而且非同源染色体之间的带型差异较大。第五对同源染色体具有一对特大的端带,这对端带在间期呈现大型的染色中心。在同源染色体之间未发现带型的多态性现象,所以,利用香雪兰的 C 带带型特征,完全可以鉴定该基卧组中的同源染色体对。文章还讨论了有关间期核的染色中心数与分裂期染色体带的数目之间的关系等问题。
The acetocarmine-Giemsa C-banding technique was used to study heterochromatin distribution in somatic chromosomes of Freesia refracta.The chromosomes of Freesia refracta showed various characteristic C-banding patterns such as terminal bands,centromeric bands and interstitial bands.The chromosome 5 was characterized by its large prominent terminal bands. This bands showed a rather large chromocentres in interphase.No band heteromorphisms were observed between bhomologous choomosomes in this plant.So the C-banding patterns can be used to identify homologous chromosomes in the genome.The relationship between the number of chromocentres in interphase nuclei and the number of chromosomal bands in metaphase was also discussed.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
1991年第3期83-86,共4页
Journal of Northeast Normal University(Natural Science Edition)
关键词
香雪兰
染色体
C显带
显带技术
Freesia refracta
C-banding patterns
Chromosomes
