Gene expression variation was measured in 17 non-laboratory strains compared to the sequenced S288c lab strain Keywords: comparative genomic hybridizations (CGH) comparing different yeast strains Each strain was grown in at least biological triplicate to log phase in rich (YPD) medium. Extracted total RNA was compared to that collected from the diploid S288C strain, DBY8268 (ura3-52/ura3-delta, ho/ho, GAL2/GAL2)