【摘要】 通过对云岭牛外周血及耳组织成纤维细胞培养制作染色体G带标本,结果显示,云岭牛染色体数目为2n=60,公牛核型为60,XY;母牛核型为60,XX。其中1~29号染色体全部为端着丝粒染色体,X染色体为亚中着丝粒染色体,Y染色体为一较小的端着丝粒染色体,Y染色体为瘤牛型的Y染色体。云岭牛染色体G带明暗相间,与其他牛品种间的带纹特征差异还需进一步研究。更多还原

【Abstract】 G-banding samples were made by peripheral blood lymphocyte culture to analyze the karyotype and G-banding pattern of the chromosomes in Yunling cattle. It showed that Yunling cattle had a karyotype of 2n=60,displaying bull for XY and cow for XX,of which 1~29 autosomes were telocentric chromosomes and 1 pair of sex-chromosome,and X chromosome was submetacentric chromosome,Y chromosome was a small telocentric chromosomes belonged to zebu type. The G-bindings of the chromosomes in Yunling cattle showed alternately binding patterns,which needed further comparison of the binding characters with other cattle breeds.更多还原