Altitudinal Variation In Phase Response Curves For The Himalayan Strains OfDrosophila Helvetica

The phase response curve (PRC) for the high-altitude Himalayan strain of Drosophila helvetica shows low amplitude and a protracted dead zone compared to the low-altitude strain.

• Both strains exhibit weak or type 1 phase response curves (PRCs), but they differ in key parameters.
• The PRC for the high-altitude (haH) strain has a low amplitude and a prolonged dead zone.
• The advance to delay ratio (A/D) is greater than 1 for the haH strain, while for the low-altitude (laH) strain, it is less than 1.
• The differences in PRCs may influence how each strain adapts to light-dark cycles based on their free-running rhythm lengths.
• The diminished photic sensitivity in the haH strain may be an adaptation to its high-altitude environment.

AI simplified