Distribution function of dN/dSin usp for five extant groups of insects. The curves describe the estimated proportion of codons that have dN/dS ratios at a value less than or equal to a particular value on the abscissa. β distributions were compared by Kolmogorov-Smirnov tests. The β-distribution parameters were estimated for the M7 model, or M8 if statistically superior to M7 (see Table 2). Drosophilidae: red; Diptera: purple; Lepidoptera: orange; Tenebrionidae: green; Blattaria: blue.
Chaumot et al. BMC Evolutionary Biology 2012 12:199 doi:10.1186/1471-2148-12-199