Fig. 6

Significantly enriched functional classes among (a) copy number expanded and (b) copy number reduced genes of A. halleri. Bars/brackets represent the proportion/number of genes in each functional class among all copy number expanded or reduced genes of A. halleri (black) or A. lyrata (white), and among all nuclear genes represented on the array (grey) for comparison. Asterisks mark statistically significant enrichment by comparison to the set of nuclear genes represented on the ATH1 microarray (Fischer’s exact test, P ≤ 0.05, Benjamini-Hochberg correction for multiple testing). The analysis was based on MapMan [51] functional categories (see Additional file 8). Shown are only top-level categories of the ontological hierarchy (see text)