FIG. 4.

Gene expression among strains from three populations evolving over 400 generations in increasing concentrations of FLC. The systematic gene name appears of the left, and the descriptive gene name appears on the right where available. The functions of genes known to include transport, stress response, and lipid metabolism are marked at the right. The color of boxes represents the constitutive expression of genes, with the scale at the bottom. Included are (a) genes overexpressed (≥1.5-fold) at generations 100 and 400; (b) genes consistently overexpressed in all three populations at generation 100 but not in all three populations at generation 400; (c) genes overexpressed in all three populations at generation 400 but not in any population at generation 100; and (d) genes underexpressed (≤1.5-fold) in all populations, either at generation 100 or generation 400.