Figure 2
Effect of weighting schemes on parsimony analysis. A. Decreasing the weight of deletions has limited effect on parsimony scores supporting the WGD hypothesis. B. Decreasing the weight of genome duplication (relative to the weight of observed gene duplications) renders the WGD scenario possible only if entire genome duplications are considered relatively common events, i.e., occurring at frequencies about an order of magnitude lower than gene duplications. Circles represent reference parsimony scores for the WGD or PGD evolutionary scenarios. WGD scores are given within a range delimited by considering deletions of genes individually or in blocks.