(A) A tree-wise analysis of the nodal estimated genome size and the calculated contrast at each node from the 18S rDNA tree (black dots) and the 31-ortholog tree (red dots). Estimations from both trees indicate that as genome size increases, the rate of evolution of genome size increases (shown on Log10 axes for plotting purposes). (B) Distribution of the median absolute contrast and the median genome size of the 20 traditionally recognized taxonomic groups from the 18S rDNA tree. Bars represent bootstrapped 95% confidence intervals. Again, a clear positive relationship is evident between genome size and the rate of genome size evolution (shown on Log10 axes for plotting purposes).
