The black spots occurred in the fore wings of male were under photoperiodic control. Only those individuals that experienced diapause induced by short days could emerged with the black spots in the fore wings of male.
雄虫前翅黑斑的出现是由光周期控制的,只有在短日照下诱导的滞育蛹,滞育解除后羽化出来的雄虫才会出现黑斑。
参考来源 - 美国白蛾生物学上的几个重要特性·2,447,543篇论文数据，部分数据来源于NoteExpress
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