Table 2 Comparison of branch models and branch specific changes in the selection coefficient (ω) among neobatrachian mitochondrial protein-coding genes

Ancestral branch

All branches

Ancestor

All

Ancestor

All

Ancestor

All

Null

0.0543

(single ω for all neobatrachian branches)

150123.5378

–

300333.08

1

0.0538

0.0962

–

–

–

–

–

–

–

150106.2460

3.09 × 10^–8

300300.49

2

0.0518

–

0.0555

–

–

–

–

–

–

150118.9262

0.0099

300325.85

3

0.0502

–

0.0569 (excluding microhylids)

–

–

–

–

–

–

150107.2616

8.54 × 10^–8

300302.52

4

0.0515

–

–

–

0.0555

–

0.0575

–

–

150114.3513

1.02 × 10^–4

300318.70

5

0.0537

–

–

0.0918

–

0.1034

–

–

–

150107.1658

7.76 × 10^–8

300304.33

6

0.0530

–

–

0.0921

0.0573

–

–

–

–

150107.0380

6.83 × 10^–8

300304.08

7

0.0537

–

–

–

0.0548

0.1030

–

–

–

150118.9788

0.0105

300327.96

8

0.0537

0.0962

–

–

–

–

–

0.0596

–

150105.5203

1.50 × 10^–8

300301.04

9

0.0546

0.0957

–

–

–

–

–

–

0.0426

150091.4881

1.21 × 10^–14

300272.98

10

0.0498

–

0.0569

–

–

–

–

0.0595

–

150105.2662

1.16 × 10^–8

300300.53

11

0.0517

–

0.0569

–

–

–

–

–

0.0425

150099.0388

2.29 × 10^–11

300288.08

12

0.0532

0.0935

–

0.0887

–

0.0989

–

0.0572

–

150091.0091

2.50 × 10^–13

300276.02

13

0.0522

0.0947

–

0.0891

–

–

0.0575

0.0586

–

150087.6890

9.94 × 10^–15

300269.38

14

0.0532

0.0942

–

0.0901

–

–

0.0576

–

0.0423

150076.2887

1.46 × 10^–19

300246.58

15

0.0541

0.0931

–

0.0899

–

0.1068

–

–

0.0419

150076.1116

1.22 × 10 ^–19

300246.22

16

0.0523

0.0962

–

–

0.0554

0.1000

–

0.0582

–

150098.5309

3.59 × 10^–10

300291.06

17

0.0537

0.0954

–

–

0.0554

0.0537

–

–

0.0422

150086.0065

1.93 × 10^–15

300266.01

18

0.0497

0.0981

–

–

0.0554

–

0.0575

0.0598

–

150090.0150

9.53 × 10^–14

300274.03

19

0.0517

0.0971

–

–

0.0554

–

0.0576

–

0.0426

150084.0983

3.01 × 10^–16

300262.20