Figure 1

Phenotypic variation in the 20 commercial yeast strains. The strains were grown at least in duplicate on solid agar plates with 1–3 doses of each environmental variable, as described in Material and Methods. Each row on the plot represents a different strain, and each column indicates a particular environment. The colored boxes represent the average growth score of each strain in each environment, as in the legend shown at the lower right. For H₂S, the color gradient indicates the color intensity of the colonies on the BIGGY agar, low or absent (blue) and high (red).