Fig. 7
Genomic distribution of copy number alterations in A. halleri and A. lyrata, relative to the A. thaliana genome. The five chromosomes of A. thaliana are represented in different colours, with centromeric regions shaded in grey and radial axis labels indicating genomic position in Mbp. Round symbols mark the positions of genes found to be copy number expanded (red) and reduced (blue), respectively, in A. halleri (outer concentric ring) and A. lyrata (inner concentric ring), with radial positions scaled to the L o g 2 signal ratio of the heterologous species vs. A. thaliana. Line symbols mark the positions of 20-kb genomic regions, within which a minimum of 5 kb region is found to be copy number expanded (red) or reduced (blue), respectively. Black line symbols mark positions of at least 3 consecutive concordant red or blue lines, corresponding to 40-kb genomic regions, in which a minimum of 10 kb is found to be copy number expanded or reduced. The centre of the radial plot shows a zoomed 0.1-Mbp region (chromosome 3, 20.8 to 20.9 Mbp), with red circles representing copy number expanded genes in A. halleri (filled circle) and A. lyrata (open circle), labelled by short gene names or AGI codes. Genes (grey) and intergenic regions (pale yellow) are marked; tickmarks are spaced by 1 kb