TABLE 3

Comparisons of five models of lineage-specific Or and Gr gene loss

OrsGrs
ModelaNo. ratesLineage(s)RatebΔAICccωidRatebΔAICccωid
Null1All0.462.790.1581.028.970.010
Host ecology2Generalist0.484.870.0560.610.000.867
Specialist0.372.89
sechellia2Generalist + ere0.320.000.6360.825.510.055
sechellia4.246.59
erecta2Generalist + sec0.504.260.0760.825.510.055
erecta0.212.21
Biogeography2African0.464.290.0751.178.420.013
Cosmopolitan0.430.0003
  • a The null model assigns a single rate of loss to all branches in Figure 4, while the other four models divide the branches into two groups according to ecology or biogeography and assign an independent rate to each group.

  • b Rates of gene loss are maximum-likelihood estimates (see appendix) and are reported as number of losses per gene per 100 million years.

  • c Relative corrected Akaike information criteria. Better fitting models have lower values. Values for best model are in italics.

  • d Akaike weights. Better fitting models have higher values. Values for best model are in italics.