Genotypic differences documented by aerial imaging. NDVIPlot
(B), canopy cover (C) in a vegetative growth stage (371°Cd) and difference of canopy temperature to air temperature (dT) (D) during flowering 727°Cd. HSD = honest significant difference (α = 0.05), avsed = average standard error of the difference. Colour of boxplots indicates maize type: hybrids (black) or maize ideotype of inbredlines: dent (green) and flint (red). The shown dates were based on observed significant differences between genotypes and relevance of the particular growth stage for plant breeding purposes.