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

文献类型： 外文期刊

第一作者： Wu Di

作者： Wu Di;Zhang Shicui;Zhuang Zhimeng;Pang Qiuxiang;Wang Changliu;Wan Ruijing

作者机构：

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.

分类号： N1

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