Establishing Chymomyza costata as a new genetic model system to study photoperiodism

光周期现象是一种机制，生物体通过这种机制感知长或短的日照长度，并对每种条件做出不同的反应。虽然光周期现象在四季分明地区的物种中很常见，但对其分子机制的研究却很少。本文试图建立一个新的遗传学上易于处理的模式系统来研究光周期。虽然我可以成功地培养C。costata在实验室条件下，配对和大量采卵困难，使C. costata是一个不理想的遗传操作物种。因此，我转向其他果蝇物种。通过对几种不同的物种进行比较，发现D.双带虫是研究光周期性最理想的系统。此外，还发现D.腐败虫属受光周期控制。

Photoperiodism is a mechanism by which living organisms perceive long or short day lengths and differentially respond to each condition. Although photoperiodism is common in species living in areas where there are four seasons, little has been studied on its molecular mechanisms. Here we tried to establish Chymomyza costata as a new genetically tractable model system to study photoperiodims. Although I could successufully culture C. costata in the laboratory, pair-mating and mass egg collection were found to be difficult, making C. costata an unideal species for genetic manipulation. Therefore, I turned to other Drosophila species. After comparing several different species, I found that reproductive diapause of D. bifasciata is the most ideal system to study photoperiodism. In addition, I found that seasonal color variation in D. puturida is under the photoperiodic control.