Phodopus campbelli detect reduced photoperiod during development but, unlike Phodopus sungorus, retain functional reproductive physiology.
Phodopus campbelli detect reduced photoperiod during development but, unlike Phodopus sungorus, retain functional reproductive physiology.
复制标题
坎贝利毛足鼠在发育过程中检测到光周期减少，但与太阳毛足鼠不同的是，它保留了功能性生殖生理机能。
作者：
M. Timonin;N. Place;E. Wanderi;K. Wynne
金黄仓鼠和西伯利亚仓鼠被广泛用作季节性繁殖的动物模型;在性成熟之前，金鱼在短时间内不表现出发育延迟，而太阳鱼幼鱼在短时间内延迟发育。由于Photopus campbelli的光周期反应还没有很好地建立，两种Photopus物种的窝在长日照（14小时光照：10小时黑暗）或短日照（10小时光照：14小时黑暗）下孕育和饲养，直到70日龄。正如预期的那样，在短光周期下，P. sungorus表现出减少的身体，睾丸，附睾，子宫和卵巢重量;窦卵泡和黄体缺失，阴道保持关闭。动物换羽冬季毛皮，和低浓度的瘦素，睾酮，催乳素的每一个存在于男性血清中。通过减少身体、睾丸、附睾和卵巢的重量来衡量，光周期短也会对腓足蜥幼鱼产生影响。夏天的积雪一直在持续。但在10 h光照：14 h黑暗条件下，雌雄蜂均能进行功能性繁殖。所有雌性动物在10周时阴道开放;卵巢含有窦卵泡和黄体，子宫重量未减轻。在男性中，睾酮，瘦素和催乳素的浓度没有减少短光周期。因此，三种仓鼠的发育模式不同，不能通过亲缘关系或起源纬度来预测。其他生态特征，如夏季降雨的可预测性，环境温度，以及对社会线索的不同反应可能很重要。
Golden (Mesocricetus auratus) and Siberian (Phodopus sungorus) hamsters are widely used as animal models for seasonal reproduction; but M. auratus shows no developmental delay in short days until after sexual maturity, whereas P. sungorus juveniles delay development in short days. As the photoperiodic response of Phodopus campbelli is not well established, litters of the two Phodopus species were gestated and reared under long days (14 h light:10 h darkness) or short days (10 h light:14 h darkness) until 70 days of age. As expected, under short photoperiod P. sungorus showed reduced body, testes, epididymides, uterus, and ovary weight; antral follicles and corpora lutea were absent and vaginae remained closed. Animals moulted to winter pelage, and low concentrations of each of leptin, testosterone, and prolactin were present in male serum. Phodopus campbelli juveniles also responded to the short photoperiod as measured by reduced body, testes, epididymides, and ovary weight. The summer pelage persisted. However, both sexes of P. campbelli developed functional reproduction under 10 h light:14 h darkness. All females had a patent vagina by 10 weeks; ovaries contained antral follicles and corpora lutea, and uteri were not reduced in weight. In males, the concentrations of testosterone, leptin, and prolactin were not reduced by short photoperiod. Developmental patterns in the three species of hamster, therefore, differ and are not predicted by relatedness or latitude of origin. Other ecological traits, such as predictability of summer rainfall, ambient temperature, and differential responses to social cues might be important.
光周期和温度影响雄性草原田鼠（田鼠）的生殖和非生殖功能。
影响因子：
3.6
作者：
Nelson,RJ;Frank,D;Smale,L;Willoughby,SB
通讯作者：
Willoughby,SB
影响因子：
3.6
作者：
FURUTA, I;PORKKAHEISKANEN, T;HSUEH, AJW
通讯作者：
HSUEH, AJW