Exceptional Enlargement of the Mitochondrial Genome Results from Distinct Causes in Different Rain Frogs (Anura: Brevicipitidae: Breviceps)

Table 2

Branch models used to estimate the dN/dS ratio () of ranoid lineages.

Model		Constraint of the model	of the model	LRT vs.
				Model 0	1	2	3
0	Constant	All neobatrachian branches have single	148549.3	—	—	—	—
1	Two (Afrobatrachia)	Afrobatrachian branches have one unique	148536.2		—	—	—
2	Two (Ranoidea)	Ranoid branches have one unique	148539.0		NC	—	—
3	Eleven	All afrobatrachian branches have distinct	148515.9				—
4	Thirty-one	All ranoid branches have distinct	148443.6

: minus log likelihood. LRT: value of the likelihood ratio test. Models 1 and 2 have the same degrees of freedom (3) and cannot be compared by LRT. However, model 2 had a higher .