GENETIC SELECTION FOR REPRODUCTIVE PHOTORESPONSIVENESS IN DEER MICE
GENETIC SELECTION FOR REPRODUCTIVE PHOTORESPONSIVENESS IN DEER MICE
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DOI：
10.1038/322172a0
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发表时间：
1986-07-10
期刊：
影响因子：
64.8
通讯作者：
BLANK, JL
中科院分区：
文献类型：
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作者：
DESJARDINS, C;BRONSON, FH;BLANK, JL
季节性繁殖在哺乳动物中很常见，特别是在热带以外的栖息地。气候和食物供应通常是决定哺乳动物一年中最佳繁殖时间的最终因素。然而，日长（光周期）通常作为季节性繁殖开始或停止的最接近信号1。某些鹿鼠种群中的某些个体对光周期有生殖反应，而同一种群中的其他个体则不然。如图所示，选择可以在短短两代内极大地改变实验室群体的光响应频率。据我们所知，这是在任何哺乳动物中首次证明生殖光响应性的选择。这意味着，一些野生鹿鼠种群必须使用多种基于遗传的繁殖策略，并且每种策略的表现程度必须根据季节性和瞬时变化的气候和饮食条件而快速变化。
Seasonal breeding is common in mammals, particularly in habitats outside the tropics. Climate and availability of food are the ultimate factors that usually dictate the optimal time of year for a mammal to breed ; however, day length (photoperiod) often serves as the proximal cue to signal the onset or cessation of seasonal reproduction1. Some individuals in some populations of deer mice are reproductively responsive to photoperiod, while other individuals in the same population are not. As shown here, selection can dramatically alter the frequency of photoresponsiveness in a laboratory population in only two generations. To our knowledge this is the first demonstration of selection for reproductive photoresponsiveness in any mammal. By implication, some wild populations of deer mice must use multiple, genetic-based reproductive strategies, and the degree to which each such strategy is exhibited must be subject to rapid change in response to both seasonally and momentarily changing climatic and dietary conditions.