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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