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Table 2 Comparison of molecular clock models and relative substitution rates of 16S rDNA. All likelihood values were calculated using PAML4. The tree shown in Fig. 2 was used to calculate relative rates and the likelihood scores for the global clock model and both local clock models. The null hypothesis of each comparison was a global clock (uniform rates) model. Clade IDs correspond to those listed in Fig. 2. All rates are relative to the rest of the tree, without the inclusion of the outgroup taxon, Roseomonas terrae. Abbreviations: DF, degrees of freedom; LR, likelihood ratio

From: Deep divergence and rapid evolutionary rates in gut-associated Acetobacteraceae of ants

Comparison DF Number of distinct rates Clade ID(s) with distinct rate LR Null hypothesis (−lnL0) Alternative hypothesis (−lnLA) p Relative substitution rates
Global clock vs. local clock 36 2 B 227.91 6479.11 6365.16 9.84E-30 7.6
Global clock vs. local clock 37 3 A, B 230.56 6479.11 6363.83 8.12E-30 8.9, 6.1