Figure 5

Possible artifactual gains and losses due to reconciliation between a correct gene tree and an incorrect species tree. (a) Addition of the armadillo and afrotherian (elephant and tenrec) genomes in version 41 of ENSEMBL cut the eutherian branch in three parts; (b) If the species tree (right column) is incorrect, reconciliation with correct gene trees (two alternative topologies are given) will generate false duplication events (red dot on gene tree and 'D' on species tree) in the first eutherian branch followed by losses (vertical green bars for loss of the green duplicate, oblique blue bars for loss of the blue duplicate) in various branches.