隐性白羽肉鸡(农大系)的染色体核型和G-带分析  

Analysis of Karyotype and G-band of Recessive White Feathered Broiler

作　　者：袁建霞[1] 张劳[1] 李宁[2] 李俊英[1] 

机构地区：[1]中国农业大学动物科技学院,北京100094 [2]中国农业大学农业生物技术国家重点实验室,北京100094

出　　处：《中国畜牧杂志》2005年第7期13-15,共3页Chinese Journal of Animal Science

基　　金：山东省科委"优质肉鸡产业化开发"项目子课题

摘　　要：本文运用鸡胚成纤维细胞系制备染色体和G显带技术,对隐性白羽肉鸡的染色体核型和G带带型进行了研究。结果表明:其二倍体染色体数目2n=78,性染色体组成为ZZ(公)和ZW(母)。根据着丝粒位置,1号,8号,Z和W为中着丝粒染色体;2号和7号为近中着丝粒染色体;4号为近端着丝粒染色体;而3,5,6,9,10,11和12号均为端着丝粒染色体,而另26对染色体为无法辨别的点状染色体。研究分析了前12对常染色体和性染色体的G带带型,并绘制了包含165条带(其中75条阳性带)的G-带模式图。Chromosome karyotype and G-banding karyotype of recessive white feather broiler were analyzed by chromosome preparation obtained from the secondary fibroblast cell lines of chicken embryos and G-banding technique. The results indicated that the total number of chromosomes was 2n=78, and the sex chromosome constitution of the male and female ZZ and ZW, respectively. According to the position of centromere, No.1, No.2, Z and W chromosomes were metacentric; No.2 and No.7 submetacentric; No.4 subtelocentric; No.3, No.5, No.6 and No.9～12 telomentric. The other 26 pairs were all undistinguished dot-shaped chromosomes. In addition, one haploid karyotype for the first 12 pairs of autosomes and sex chromosomes corresponded to 165 (75 positive) G-bands showed by the ideogram.

关 键 词：畜牧、兽医科学基础学科 核型 G-带 隐性白羽肉鸡 

分 类 号：S831.2[农业科学—畜牧学]