Figure 1
From: Maximum likelihood models and algorithms for gene tree evolution with duplications and losses
LCA-reconciliation. Example of a reconciliation based on a parsimony between the gene tree G and the species tree S. The reconciled tree defines the evolutionary scenario with the minimal number of gene duplications and gene losses. R(G, S) has two gene duplications, denoted by squares, and three gene losses, denoted by circles and dot lines. The red horizontal bars in R(G, S) denote speciation events.