突变体——侏儒小鼠(dw~t)与津白3(TA3)不同日龄骨骼、体重及体长的比较

侏儒小鼠与津白3体重的比值为1:2.5。它们的骨骼、休重、休长及尾长的测量均具非常显著或显著意义。经均衡性检验,不同日龄、不同性别间TA3/dw~t小鼠的不同骨骼、体重、体长及尾长的比值变化是均匀一致的。证明侏儒小鼠骨骼、体重、体长及尾长均系均匀缩小,是身体各部分匀称的侏儒小鼠。

COMPARISON OF BONE DIMENSION, BODY WEIGHT AND BODY LENGTH BETWEEN MUTANT DWARF MICE (DW~t) AND TA3 AT DIFFERENT AGES

A reccesive mutant mouse which first appeared among the colony of the inbred mice-Tian-jin Albino 3 (TA3) was discovered in Tianjin Medical College by T. Y. Chen in 1982. It was a male, showing juvenile body proportion when reached adulthood, vigorous but fertile. Now it had ken propagated in line. Studies of body weight and body dimension were conducted to monitor the growth of mutant and normal mice. A total of 59 pairs of the same sex of dwarf mice and TA3 sibs of different age groups(30,50 and 90 days) were accumulated. Body weight, bone dimension, body length and tail length were measured. All of the p values when comparing between dwarf and TA3 were less than 0.01 or 0.05 for humerus, radius, femur, and tibia length, skull width and length. There were 88 pairs of different ages groups of 30-, 50, and 90 days and same sex of dwarf and sibs. The ratio of average body weight of TA3 to dwarf was about 2.5:1. The body length and tail length of TA3 at different ages were all greater than those of the dwarf through t test (p<0.01 or 0.05). The ratios of TA3 to dwarf for body length and tail length at different ages through correlation analysis showed no significant difference (p>0.05). The mutant-dwarf mice, though small, were well proportioned.