C-banding pattern and nucleolar organizer regions of Cynoglossus semilaevis Günther, 1873  

作　　者：WU Di ZHANG Shicui ZHUANG Zhimeng PANG Qiuxiang WANG Changliu WAN Ruijing 

机构地区：[1]Department of Marine Biology, Ocean University of China, Qingdao 266003, China [2]Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China [3]Department of Biology, Yantai Normal University, Yantai 264025, China

出　　处：《Progress in Natural Science:Materials International》2006年第7期769-772,共4页自然科学进展·国际材料（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 30271027) partially by the Ministry of Science and Technology (MOST) of China (Grant No. 2002AA603011, 2004AA603320)

摘　　要：The C-banding pattern and nucleolar organizer regions of the metaphase chromosomes of Cynoglossus semilaevis are reported. The interstitial regions in all chromosomes including the pair of sex chromosomes had positive C-bands, and the 6th and 12th pairs of chromosomes were entirely stained in most cases. Some chromosomes such as the 1st, 2nd, 7th, 8th, 9th and 10th pairs showed C- bands at centromeric or distal ends. The C-banding heretochromatin occupies 30.03 % of the total chromosome surface in C. semilaevis, which is similar to that of amphibians such as Mixophyes fasciolatus （30.2 % ） and M. schevilli （20.7 % ）, but is rather lower than that of cephalochordate Branchiostoma belcheri （54.3%）. Silver staining revealed a single pair of nucleolar organizer regions （NORs） located in the telomeric regions of Chromosome 2. The association of NORs with heterochromatin observed in vertebrates also occurs in C. semilaevis as the telomeric regions of Chromosome 2 are always stained positively with C-banding.乐队 C 模式和 Cynoglossus semilaevis 的中期染色体的核仁的组织者区域被报导。在包括性染色体的对的所有染色体的 interstital 区域有积极 C 乐队，和 6 <SUP > th </SUP> 和第 12 个染色体完全在大多数情况中被染色。一些染色体例如第一，第二，第 7，第 8，第 9 和第 10 对在 centromeric 或远侧的结束显示出 C 乐队。染色质占据的到此为止的乐队 C 30.03% 全部的染色体出现在 C。semilaevis，它类似于象 Mixophyes fasciolatus (30.2%) 和 M 那样的两栖动物的。schevilli (20.7%) ，但是比头索动物 Branchiostoma belcher i (54.3%) 的相当低。银染色揭示了位于染色体 2 的 telomeric 区域的核仁的组织者区域(NORs ) 的单个对。有在脊椎动物观察的异种染色质的 NORs 的协会也发生在 C。染色体 2 的 telomeric 区域总是是的半 laevisas 与乐队 C 断然染色了。

关 键 词：Cynoglossus semilaevis KARYOTYPE C-BANDING NORs. 

分 类 号：Q78[生物学—分子生物学]