Table 2.

Posterior probabilities for different scenarios regarding the mutation rate (2a) and tree topology (2b) models

a)
Considered scenario	Mutation rate	Posterior probability
Topology 1 (North-to-South)	Slow	0.10
	Standard	0.90
Topology 2 (South-to-North)	Slow	0.11
	Standard	0.89
b)
Considered scenario	Expansion scenario	Posterior probability
Standard mutation rate	Topology 1	0.88
	Topology 2	0.12