关键词: 裸小鼠BALBc系, 繁殖性能, 屏障系统

Abstract: Objective\ To observe and analyze the reproductive capacity and the breeding regularity of different foetal numbers in BALB/c nude mice.Methods\ 160 seed mic e (80 male mice and 80 female mice)were observed and statistically classified acco rding to the data of the breeding cards.Results\ The pregnant rates of BALB/c nude mice was 95%.The average foetal number of each female nude mouse was 3.09±1.23 and the average breeding number was 7.21± 2.74. The number of all homozygotes was 50.23 percent of all breeding number and the average homozygote number of each nest was 3 64±1 57.The wean number of homozygotes was 88.32 pe rc ent of homozygote number and the average wean number of each nest was 3.22±1.83 .The reproductive capacity was the best at the second and the third foetal numbe r,took second place at the first and the fourth foetal number and was the worst at the fifth foetal number.Conclusion\ The breeding of BALB/c nude m ice is fine in the third grade barrier system,but seed mice should be changed af ter the third or the fourth foetal number is bred.

Key words: Naked little mouse/BALB/cs department, Breed performance, System of protective scr een