Osadchuk L V
Institute of Cytology and Genetics, Russian Academy of Sciences, Novosibirsk, Russia.
Genetika. 1998 Jul;34(7):941-6.
Fetal gonad weight and testosterone content in serum and gonads were analyzed in silver fox every five days from the 35th day of pregnancy until delivery. Fetal testicles were also tested for testosterone production induced by chorionic gonadotropin (CG) in vitro. Pregnant females were sampled from an experimental population subjected to selection for domesticated behavior and a commercial population (control). Fetal gonad weight was significantly lower in domesticated animals than in controls. No differences were revealed in the testosterone contents in their serum and gonads and in the basal production of testosterone in fetal testicles. CG-induced production of testosterone was detectable from the 40th day of fetal development in domesticated animals and from the 50th day in controls. The results obtained suggest that domestication results in the hetero-chronic fetal development of the hypophysial-testicular complex in silver fox.
从怀孕第35天到分娩，每隔五天对银狐的胎儿性腺重量以及血清和性腺中的睾酮含量进行分析。还对胎儿睾丸进行体外绒毛膜促性腺激素（CG）诱导的睾酮生成检测。从经过驯化行为选择的实验群体和商业群体（对照）中采集怀孕母狐样本。驯化动物的胎儿性腺重量显著低于对照组。它们的血清和性腺中的睾酮含量以及胎儿睾丸中睾酮的基础生成量均未发现差异。在驯化动物中，从胎儿发育第40天可检测到CG诱导的睾酮生成，而在对照组中从第50天开始可检测到。所得结果表明，驯化导致银狐垂体 - 睾丸复合体出现异时性胎儿发育。
