Fig. 4

The observed spectrum of Gallus gene tree topologies is similar to expectation given the multispecies coalescent. Expected numbers of gene trees with each topology were calculated assuming the topology and branch lengths that were estimated by ASTRAL when gene trees were used as input. The topology for each gene tree is presented as a rooted newick string using a single letter (first letter of the species name) to indicate each Gallus species. The speciodendric gene tree is shaded in pink