Limited thermal plasticity and geographic divergence in the ovipositor of Drosophila suzukii

Abstract

Running title:Plasticity of Drosophila suzukii ovipositor to developmental temperature ). It is well-known that fruits texture is strongly affected by temperature (e. g. Bourne, 1982): specifically, their firmness and resistance to puncture tends to decrease with increasing temperature (e. g. Khazaei and Mann, 2004). It is thus conceivable that D. suzukii ovipositor might present some adaptive plasticity to temperature, allowing it to pierce fruits skins of (thermally induced) varyingresistance. An alternative hypothesis is that it might rather be under stabilizing selection, as has been suggested in D. melanogaster for genitalia (Shingleton et al., 2009), in which case we should expect a reduced sensitivity to temperature.The ovipositor is a microscopic 3D structure (about 500 μm). 3D characterization of its shape is essential to recover all the possible features involved in its performance and therefore to link its

Drosophila suzukii wing spot size is robust to developmental temperature

“…These results are consistent with some of the previous studies on the invasion of D. suzukii . No difference in thermal plasticity of wing shape, activity rhythms, gene expression and ovipositor shape was detected (Fraimout et al, ; Plantamp et al, ; Varón‐González, Fraimout, Delapré, Debat, & Cornette, ). There is still scarce evidence that thermal plasticity might have contributed to the success of the invasion in this species (but see e.g., Everman et al, ).…”