Figure 1: Convergent increase in rates of genome evolution in mutualists.
From: Comparative genomics reveals convergent rates of evolution in ant–plant mutualisms
(a) Phylogenetic relationships between species sequenced in this study. Throughout, green indicates mutualists and orange indicates generalists. Acacia–ant mutualist Pseudomyrmex spinicola and generalist P. gracilis are pictured. Photographs ©Alex Wild/alexanderwild.com and used with permission. (b) Mean±s.d. of genetic distances of each species from P. gracilis in 38,862 25 kb windows across the genome and limited to 4,082 coding regions (CDS). Estimates of dN, dS and dN/dS are also shown. Significance (P<0.01) was determined between species with paired t-tests across all windows and Wilcoxon signed-rank tests across all genes. We indicate significance only between the pairs of species: P. concolor versus P. pallidus, P. flavicornis versus P. sp. PSW-54 and P. dendroicus versus P. elongatus. All other significance values are shown in Supplementary Table 3.
