豫医无毛小鼠分离近交系的建立及其遗传纯度测定

Establishment of Segregating Inbred Strain of Yuyi Hairless Mice and Its Monitoring of Genetic Characteristics

采用强迫杂合性兄妹交配方式培育携带无毛突变基因的分离近交系 ,然后用生化标记法、皮肤移植实验和毛色基因测试法对其进行遗传监测。并对其基本生物学特性进行了研究。结果育成了具有独特生物学特性的豫医无毛小鼠分离近交系。现已达 30代。生化标记法测定的 9条染色体上 13个生化标记位点全部纯合 ;同系异体间皮肤移植 10 0天后 ,未见排斥现象 ,为同系组织遗传性 ;与DBA/2交配进行的毛色基因测试 ,杂交的F1代相同 ,全部为野生色 ,基因型为AABBccDD。表明豫医无毛小鼠已成为一个达到国际标准的新品系。

Using brother sister inbreeding with forced heterozygosity to breed a new segregating inbred strain which carry mutant hairless gene. Then, genetic monitoring was conducted by the skin grafting test, coat color test and biochemical marker analysis, and its basic biological characteristics were studied with corresponding methods. The Results are that the Yuyi Hairless Mice (YYHL) with unique biological characteristics have been bred successfully and have progressed to 30th generation since 1991. Thirteen biochemical markers loci on nine chromosomes coding biochemical markers measured with electrophoresis were all homogenous. The skin grafting test showed that no dropping graft was found during 100 days after transplanting, implying the YYHL was of isohistogenicity. Analysis of coat color genes indicated that the hair color of first generation hybrid crossed between YYHL and DBA/2 was all agouti suggesting that the coat color genes of the YYHL were homogenous. The gene type is AABBccDD . All these showed that the YYHL have been an inbred strain reaching the international standards.