Allometric and nonallometric components of Drosophila wing shape respond differently to developmental temperature.
Phenotypic plasticity of wing size and shape of Drosophila simulans was analyzed across the entire range of viable developmental temperatures with Procrustes geometric morphometric method. In agreement with previous studies, size clearly decreases when temperature increases. Wing shape variation was decomposed into its allometric (24%) and nonallometric (76%) components, and both were shown to involve landmarks located throughout the entire wing blade. The allometric component basically revealed a progressive, monotonous variation along the temperature. Surprisingly, nonallometric shape changes were highly similar at both extremes of the thermal range, suggesting that stress, rather than temperature per se, is the key developmental factor affecting wing shape.
Debat
Vincent
V
Populations Génétique et Evolution, CNRS, Avenue de la Terrasse, 91198 Gif sur Yvette Cedex, France. debat@citrus.ucr.edu
Bégin
Mattieu
M
Legout
Hélène
H
David
Jean R
JR
D000704:Analysis of Variance; D000818:Animals; D001699:Biometry; D001837:Body Weights and Measures; D004330:Drosophila / Q000033:anatomy & histology / Q000196:embryology*; D013312:Stress, Physiological / Q000196:embryology*; D013696:Temperature; D014921:Wings, Animal / Q000033:anatomy & histology* / Q000196:embryology