FIG. 4.—

Agreement of individual gene families with plurality tree. For details on score calculation, see Materials and Methods. Average agreement score was 0.54 and is indicated by a star. The main graph shows the agreement based on all embedded quartets (regardless of their resolution). The inset shows the distribution of proportions of unresolved quartets per gene family. On average, 45% of quartets per family were unresolved, explaining why agreement scores are somewhat low. However, the agreement with plurality topology is significantly better than random, for which average agreement score was 0.294 ± 0.003.