Fig. 4From: Desiccation resistance and pigmentation variation reflects bioclimatic differences in the Drosophila americana species complexRelationship between mean desiccation resistance (circles) or pigmentation (diamonds) in each population and PC1 (top panel) or PC2 (bottom panel). The left-side y-axis corresponds to desiccation resistance in minutes survived, while the right-side y-axis show pigmentation values on that correspond to a greyscale value represented by the gradient bar. PC1 is not significantly associated with desiccation resistance (r(7) = 0.15; P = 0.71) or pigmentation (r(7) = 0.53; P = 0.15) was across all 9 populations (top, grey trend lines). PC2 is associated with both desiccation resistance (r(7) = 0.74; P = 0.022) and pigmentation (r(7) = 0.68; P = 0.044) (bottom, black trend lines), prior to multiple testing correctionBack to article page