Figure 1.

The Maximum Likelihood for Gene Order Analysis (MLGO input phylogenetic tree for the eight birds plus ostrich taken as an outgroup genome. The tree was visualised using the ETE v3 toolkit [37]. The respective Newick format tree can be written as (((((Atlantic canary, Common blackbird), Eurasian woodcock), (Pigeon, Houbara bustard)), ((Chicken, Helmeted guinea fowl), Duck)), Ostrich); as inferred from the Prum et al. [36] phylogeny for birds. Provisional support values (1) are shown in red.