Skip to main content
. 2018 Nov 9;17(2):127–150. doi: 10.1111/gbi.12322

Figure 4.

Figure 4

Effect of model selection on estimated divergence times. (a) Divergence times of key nodes in the evolution of Type II reaction centers as a function of the root prior. The root prior was varied from 3.2 to 4.1 ± 0.05 Ga under a CAT + GTR + Γ model. The colored dots match selected nodes of interest in Figure 3. The thick gray bar marks the GOE and the narrow bar marks the minimum accepted age for the origin of photosynthesis. (b) Identical to (a) but using a LG + Γ model of amino acid substitutions. (c) Divergence times of key nodes assuming a root prior of 3.5 Ga as a function of the standard deviation on the root. The standard deviation was varied from 0.025 to 0.4 Ga under a CAT + GTR + Γ model. (d) Identical to (c) but using a LG + Γ model. In every case, D0 is the oldest node after the root and the magnitude of ΔT is always in the range of a billion years [Colour figure can be viewed at wileyonlinelibrary.com]