C-banding pattern and nucleolar organizer regions of Cynoglossus semilaevis Gunther, 1873
文献类型: 外文期刊
作者: Wu Di 1 ; Zhang Shicui 2 ; Zhuang Zhimeng 2 ; Pang Qiuxiang 2 ; Wang Changliu 2 ; Wan Ruijing 1 ;
作者机构: 1.Ocean Univ China, Dept Marine Biol, Qingdao 266003, Peoples R China
2.Ocean Univ China, Dept Marine Biol, Qingdao 266003, Peoples R China; Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China; Yantai Normal Univ, Dept Biol, Yantai 264025, Peoples R China
关键词: Cynoglossus semilaevis;karyotype;C-banding;NORs
期刊名称:PROGRESS IN NATURAL SCIENCE ( 影响因子:0.704; 五年影响因子:0.688 )
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收录情况: SCI
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.
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