Table 6 Likelihood ratio test and positive selection sites based on M7 model and M8 model

atpH

2

30.473

2.410 × 10^–5

4L** 55L* 74L** 75L**

psaA

2

23.493

7.916 × 10^–6

209G*

psaB

2

15.817

3.677 × 10^–4

255L*

psbB

2

31.927

1.167 × 10^–7

238L*

psbC

2

31.401

1.518 × 10^–7

None

psbD

2

1.977

0.337

None

psbE

2

38.746

3.858 × 10^–9

30L**

psbF

2

5.620

0.060

None

psbH

2

0.001

0.999

None

psbI

2

7.377

0.025

None

psbK

2

8.233

0.016

10 M*

psbL

2

32.383

9.290 × 10^–8

13S** 24L* 31L**

psbT

2

2.364

0.307

None

rbcL

2

31.228

1.655 × 10^–7

116 M* 251L* 375L**

rpl21

2

4.590

0.101

None

rpl32

2

44.376

2.311 × 10^–10

63P** 64S**

rps14

2

6.445

0.040

25S*

ycf12

2

2.987

0.225

None