Figure 9.

Frequency of deletions among natural isolates in relation to geometric mean fitness in culture. Fitness data from competition-pool studies by Parsons et al. (2006). All the labelled points with high frequency of occurrence are genes of unknown function except YFL056C, which encodes AAD6, an aryl-alcohol dehydrogenase for which there are seven similar ORFs in the genome. YHL047C has the highest geometric mean in this set of loci, and was deleted at only a single site; it encodes the siderophore receptor ARN2.