Wigmore P M, Strickland N C
Growth. 1983 Spring;47(1):67-76.
The largest and smallest littermates were chosen by weight from litters of pigs from 38 days' gestation until 1 day post partum. DNA, RNA and two fractions of protein (sarcoplasmic and fibrillar) were measured in the semitendinosus muscle. Total DNA, RNA and protein were found to increase throughout gestation and to have significantly higher values in the larger littermates. DNA concentration reached a maximum at 80-100 days' gestation and then declined. RNA concentration declined throughout gestation while protein concentration fell to a minimum value at 54 days and then increased until term. No difference could be demonstrated between large and small littermates in the concentrations of the above constituents. The RNA/DNA ratio remained relatively constant throughout gestation but was significantly higher in the larger littermates. The protein/DNA ratio increased towards the end of gestation but showed no difference between large and small animals. These results are discussed in terms of the histology of developing muscle and the nutritional status of large and small littermates.
从妊娠38天至产后1天的猪仔窝中，按体重挑选出最大和最小的同窝仔猪。测定了半腱肌中的DNA、RNA和两种蛋白质组分（肌浆蛋白和纤维状蛋白）。发现总DNA、RNA和蛋白质在整个妊娠期都增加，并且较大的同窝仔猪的值显著更高。DNA浓度在妊娠80 - 100天时达到最大值，然后下降。RNA浓度在整个妊娠期下降，而蛋白质浓度在54天时降至最小值，然后一直增加到足月。上述成分的浓度在大小同窝仔猪之间没有差异。RNA/DNA比值在整个妊娠期保持相对恒定，但在较大的同窝仔猪中显著更高。蛋白质/DNA比值在妊娠末期增加，但在大小动物之间没有差异。根据发育中肌肉的组织学以及大小同窝仔猪的营养状况对这些结果进行了讨论。
