Andresen O
J Reprod Fertil. 1976 Sep;48(1):51-9. doi: 10.1530/jrf.0.0480051.
The levels of 5alpha-androstenone and testosterone in peripheral plasma and 5alpha-androstenone in fat collected from 18 boars selected according to thickness of back fat and rate of gain were evaluated. Sampling was started when the animals were about 100 days of age and samples were collected every 14 days until the boars were about 240 days old. The steroid profiles varied considerably between boars, although an increase in steroid levels was found in most animals with the onset of adolescence. The regression line for the level of 5alpha-androstenone in fat and the age of the animals in days was found to be y = 0.02x-1-31. High coefficients of correlation were found between the concentration of 5alpha-androstenone in peripheral plasma and fat (r = 0-78) and between levels of 5alpha-androstenone and testosterone in peripheral plasma (r = 0-64). Levels of 5alpha-androstenone in peripheral plasma above about 15 ng/ml were usually accompanied by a heavy accumulation of 5alpha-androstenone in adipose tissue. The use of four of the boars for mating resulted in increased steroid levels in peripheral plasma and fat. Significantly higher levels of 5alpha-androstenone and testosterone were found in the peripheral plasma of boars selected for fatness and a low rate of gain than in boars selected for low back-fat thickness and a high rate of gain.
对根据背膘厚度和增重率挑选出的18头公猪的外周血浆中5α-雄烯酮和睾酮水平以及脂肪中5α-雄烯酮水平进行了评估。当动物约100日龄时开始采样，每14天采集一次样本，直至公猪约240日龄。尽管在大多数动物进入青春期时类固醇水平有所升高，但不同公猪的类固醇谱差异很大。发现脂肪中5α-雄烯酮水平与动物日龄的回归线为y = 0.02x - 1 - 31。外周血浆和脂肪中5α-雄烯酮浓度之间（r = 0 - 78）以及外周血浆中5α-雄烯酮和睾酮水平之间（r = 0 - 64）发现了高相关系数。外周血浆中5α-雄烯酮水平高于约15 ng/ml时，通常伴随着脂肪组织中5α-雄烯酮的大量积累。使用其中4头公猪进行配种导致外周血浆和脂肪中类固醇水平升高。与选择低背膘厚度和高增重率的公猪相比，选择肥胖和低增重率的公猪外周血浆中5α-雄烯酮和睾酮水平显著更高。
