Sexual difference in the photoperiodic induction of pupal diapause in the flesh fly Sarcophaga similis
Sexual difference in the photoperiodic induction of pupal diapause in the flesh fly Sarcophaga similis
复制标题
肉蝇类果蝇蛹滞育光周期诱导的性别差异
DOI：
10.1111/j.1479-8298.2010.00394.x
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发表时间：
2010
影响因子：
0.9
通讯作者：
S.G
中科院分区：
文献类型：
--
作者：
Tagaya;J.;Numata;H.;Goto;S.G
肉蝇对短日照的滞育反应相似，但对长日照的滞育反应相似。该物种在滞育的光周期诱导中表现出性别差异，雌性比雄性具有更短的临界日照长度。在这里，我们提出了两个假设来解释这种性别差异。首先，我们提出了光周期定性评估的性别差异。这一假说假设在外部符合模型下，虽然两性的光诱导期都位于暗期晚期，但雄性的光诱导期稍早。然而，夜间中断实验的结果显然排除了这一假设。因为我们证实了S。相似的光周期定量评估，我们接下来提出了一个性别差异的光周期的定量评估。这一假设结合了一个假设的物质积累的概念，显示了滞育诱导效应和内部阈值，作为参考，以确定滞育/非滞育发育程序。在长日暴露实验和夜间中断实验中，雌性的滞育发生率始终低于雄性。因此，本研究的数据令人满意地满足第二个假设，即在光周期的定量评估中存在性别差异。
The flesh flySarcophaga similisenters pupal diapause in response to short days, but averts diapause under long days. This species shows a sexual difference in the photoperiodic induction of diapause, with females having shorter critical daylength than males. Here, we proposed two hypotheses to explain this sexual difference.First, we proposed a sexual difference in the qualitative evaluation of photoperiods. This hypothesis assumes under the external coincidence model that although the photoinducible phase of both sexes locates at late scotophase, in males, it locates at a slightly earlier phase. However, the results of night interruption experiments clearly ruled out this hypothesis. Because we verified thatS. similisevaluated photoperiods quantitatively, we next proposed a sexual difference in the quantitative evaluation of photoperiods. This hypothesis incorporates concepts of a hypothetical substance accumulation that shows a diapause‐inducing effect and an internal threshold that serves as a reference to determine the diapause/nondiapause developmental program. In long‐day exposure experiments and night interruption experiments, females consistently showed a lower incidence of diapause than males. Thus, the present study data satisfactorily meet the second hypothesis, that is a sexual difference in the quantitative evaluation of photoperiods exists inS. similis.