Figure 1.

An arrhythmic photoperiod phenocopies the effects of increasing temperature on a mito‐nuclear incompatibility that extends development. An arrhythmic, constant‐light photoperiod (L:L) accelerates development in control genotypes relative to a rhythmic photoperiod (L:D), but delays development in the mito‐nuclear incompatible genotype (simw ⁵⁰¹);OreR (Table S1). For comparison, the developmental delay of (simw ⁵⁰¹);OreR larvae relative to control genotypes under constant light at 22°C is greater than the delay observed at 25°C under fluctuating light (L:D) (25°C data from Hoekstra et al. (2013)). Asterisks denote a significant effect of the mtDNA × nuclear genetic interaction within each temperature‐photoperiod combination at the level of P < 0.0001 (Table S2), with the associated mean days delayed of (simw ⁵⁰¹);OreR relative to (simw ⁵⁰¹);Aut and the percent increase in development time in parenthesis.