推荐回答(2个)
1、品种特征不同
BALB/c鼠的遗传背景为近交系,由亲兄弟姐妹遗传繁殖,因而它们之间的个体差异就小,比起ICR小鼠遗传基因更纯,整体素质更好。
2、来源不同
ICR小鼠是Hauschka用Swiss小鼠群以多产为目标进行选育,以后美国癌症研究所(Institute of Cancer Research)分送各国饲养实验,各国称之为ICR小鼠。
BALB/c 是白变种实验室老鼠,与众多常用亚系一样,起源于小家鼠(Mus musculus)。从1920年它们在纽约诞生至今,BALB/c小鼠在全球研究机构繁衍了超过200代,广泛用于免疫学、生理学的动物实验。

扩展资料:
BALB/C小鼠的主要优势:
BALB/c小鼠乳腺癌发病率低,但随着年龄增长,患其他癌症(如肺癌和肾癌)的几率大为增加。乳腺肿瘤发生率约为10%~20%。有一定数量的卵巢、肾上腺和肺部肿瘤、白血病的发生。肺癌发病率雌性26%,雄性29%。白血病发病率雌性12%,雄性10%。
血压与其他近交系小鼠相比为最高,有自发高血压症。老年小鼠心脏有某些病变,雌雄小鼠常有动脉硬化。几乎全部20月龄的雄性小鼠均有淀粉样变。对鼠伤寒沙门氏菌C`5敏感,对麻疹病毒中度敏感,易患慢性肺炎,对放射线极度敏感。
富于网状内皮细胞的器官(如肝、脾)与体重相比,所占比值很大。常用于单克隆抗体和免疫学研究。 BALB/c小鼠生产性能好,繁殖期长,一般无相互侵袭习性,比较容易群养。
平均寿命:有的记载雄鼠为509天,雌鼠为561天;有的记载雄鼠为648天,雌鼠为816天。平均体重252日龄雄鼠为30 g,雌鼠为28g。
参考资料来源:百度百科-ICR小鼠百度百科-BALB/C小鼠
小鼠(mouse),学名:mus musculus,在生物分类学上属脊椎动物门、哺乳动物纲、啮齿目、鼠科、鼷鼠属、小家鼠种.
小鼠品种之一:ICR小鼠
生活习性
生长发育:小鼠在哺乳动物中体型最小,新生仔鼠1.5g左右,45天体重达18g以上.小鼠体重的增长与品系的来源、饲养营养水平、健康状况、环境条件等有密切关系.几个不同品系小鼠的正常生长发育曲线见图
活动规律:小鼠性情温顺,易于捕捉,胆小怕惊,对外来刺激敏感,喜居光线暗淡的环境.习惯于昼伏夜动,其进食、交配、分娩多发生在夜间.一昼夜活动高峰有两次,一次在傍晚后1~2小时内,另一次为黎明前.
采食特性:小鼠门齿生长较快,需常啃咬坚硬食物,有随时采食习惯.
繁殖特性:小鼠成熟早,繁殖力强,寿命1~3年.新生仔鼠周身无毛,通体肉红,两眼不睁,两耳粘贴在皮肤上.一周开始爬行,12天睁眼,雌鼠35~50日龄性成熟,配种一般适宜在65~90日龄,妊娠期19~21天,每胎产仔8~12只.可根据阴道栓的有无来判断小鼠是否发生了交配.
群居特性:小鼠为群居动物,群养时雌雄要分开,雄鼠群体间好斗,群体处于优势者保留胡须,而处于劣势者则掉毛,胡须被拔光.这一现象与因寄生虫性或真菌性皮炎所致的掉毛相区分.
温湿度要求:小鼠对温湿很敏感,一般温度以18~22℃,相对湿度以50%~60%最佳.
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