Table 3 Parameter estimates and likelihood ratio tests for the branch model

M0 (one ratio model)

1

-47935.395

ω=0.143

-

-

-

None

 Estimate ω for I-1

2

-47935.222

ω₀=0.143, ω_I1= 0.083

Model 2 Vs M0: 0.346

1

0.556

-

 Estimate ω for II-1

2

-47930.020

ω₀= 0.146, ω_II1= 0.083

Model 2 Vs M0: 10.750

1

0.001

-

 Estimate ω for II-2

2

-47924.924

ω₀= 0.147, ω_II2= 0.065

Model 2 Vs M0: 20.943

1

0.091

-

 Estimate ω for II-3

2

-47935.383

ω₀= 0.143, ω_II3= 0.147

Model 2 Vs M0: 0.024

1

0.000

-

 Estimate ω for II-4

2

-47934.740

ω₀= 0.143, ω_II4= 0.199

Model 2 Vs M0: 1.310

1

0.252

-

 Estimate ω for II-5

2

-47935.385

ω₀= 0.143, ω_II5= 0.148

Model 2 Vs M0: 0.020

1

0.888

-