DXB/c近交系小鼠的建立及遗传学检测

Establishment and genetic checkup of an inbred strain of DXB/c mouse

将DBA/2雌鼠与C_(57)BL/6雄鼠杂交后,利用其F_2代连续进行兄妹交配,建立了DXB/c近交系小鼠。目前已近交28代,历时13年。经皮肤移植试验、下颌骨形态分析、混合淋巴细胞培养、毛色基因及生化标志基因检测,表明DXB/c系小鼠的基因已经纯合,符合一个近交系小鼠的标准。毛色基因及生化标志基因测试结果同时表明DXB/c系小鼠的遗传背景组合了两亲代品系的遗传基因。

An inbred strain of DXB/c mouse has been established by hybridization between DBA/2 female mice and C57BL/6 male ones and subsequently by sibmating their offsprings beginning from the F2 generation.Now DXB/c mouse has been passed for 28 generations of full sibmating since 1979.Genetic checkup by means of skin grafting,mandibular morphology analysis,mixed lymphocyte cultivation,coat colour gene testing,and biochemical marker gene examination confirmed that the full homozygosity of alleles has been achieved in DXB/c mouse and DXB/c mouse comforms to the criteria of an inbred strain of mouse.In addition,the genetic background of DXB/c mouse is composed of the genes of its progenitors DBA/2 and C57BL/6 as shown by coat colour gene testing and biochemical marker gene examination.