中国小鲵的核型
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国家自然科学基金项目(No.30570250,30870287)


The Karyotype of Hynobius chinensis
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    摘要:

    中国小鲵(Hynobius chinensis)被描述于116年前,我国学者于2005年在模式产地湖北宜昌再次采到标本,至此该物种的有效性得以确认。以2007年采于模式产地的中国小鲵胚胎为材料,采用Giemsa染色方法,对中国小鲵的核型进行了分析。结果表明,中国小鲵的二倍体染色体数为56,28对染色体按大小和形状可以分为4组:第一组,包括Nos.1~9,由大型m,sm,st染色体组成;第二组为中型双臂染色体组,由Nos.10~13组成,包含m,sm染色体;第三组,包括Nos.14~18,由小型m染色体组成;第四组,包括Nos.19~28,由小型t染色体组成。与小鲵属其他物种相比,中国小鲵核型与具染色体数为2n=56的类群核型大致相同,差异出现在染色体分组和相应染色体着丝点类型上。

    Abstract:

    Hynobius chinensis was re-discovered by Wang et al.from the type locality in 2005,116 years after its first description,which proves that H.chinensis is a true Hynobius species.In this paper,the karyotype of H.chinensis from the type locality was described by using embryos and staining with Giemsa.The results indicated that all individuals had a diploid number of 56 chromosomes and can be divided into four groups:the first group contained large biarmed m,sm,st chromosomes(Nos.1-9);Nos.10-13 composed the second,medium-sized group which contained m and sm chromosomes;the third group was composed of 5 pairs of metacentric chromosomes(Nos.14-18);the fourth group included 10(Nos.19-28)uniarmed microchromosomes.The results indicated that the karyotype of H.chinensis was similar to that of the other species with 2n=56 chromosomes.Although there were also some differences in the centromere type and grouping,the diploid chromosome number is not changed.

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卿立燕,陈勤,曾晓茂,王一丁.2009.中国小鲵的核型.动物学杂志,44(4):125-128.

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  • 收稿日期:2008-12-18
  • 最后修改日期:2009-04-27