Gene ontology (GO) annotation for transcripts that were strongly differentiated expressed in each strain (>4 fold change and FDR ≤ 0.05). Results shown for level 2 categories for a) Biological process (“org.” = organization); b) Molecular function (“TFA” = transcription factor activity); c) Cellular component. Bars are color coded to represent fish by their environment: desert strain (red; LJ = Little Jacks Cr.), F1 crosses (gray; LJxK), montane strain (blue; K = Keithley Cr.).