Figure 1
From: Probabilistic modeling of the evolution of gene synteny within reconciled phylogenies
Principle of the method. Given two gene trees (dark blue tree and light blue tree) reconciled within a species tree (black tree), and sharing adjacencies in some extant species (species A and C), we reconstruct hypothetical ancestral adjacencies (in species D and E) using a model of evolution and maximum likelihood algorithm. Our method allows for losses (cross in light blue tree between species B and species D), and duplications (empty square in dark blue tree) of genes.