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Table 3 Selective pressure analyses of Gymnitifores by the Branch-Site Model

From: Molecular evolution of globin genes in Gymnotiform electric fishes: relation to hypoxia tolerance

Gene

Branch

Model

Ln

2ΔLn

p

Parameter

Positive selected sites

Hba

E.electricus

Ma

3039.610

  

ω0 = 0.129, ω1 = 1, ω2 = 6.251

18-0.995**, 46–0.990*

  

Ma0

3042.305

5.390

0.020

ω0 = 0.129, ω1 = 1, ω2 = 1

 

Hbb

B.gauderio

Ma

3177.724

  

ω0 = 0.145, ω1 = 1, ω2 = 34.694

20-0.955*, 29–0.973*, 113–0.989*, 114–0.912, 132–0.981*, 133–0.888

  

Ma0

3187.339

19.230

<0.001

ω0 = 0.139, ω1 = 1, ω2 = 1

 

Mb

B.gauderio

Ma

5191.675

  

ω0 = 0.137, ω1 = 1, ω2 = 15.025

9-0.987*, 18–0.964*, 98–0.940, 109–0.990**, 122–0.994**, 134–0.992**, 138–0.911

  

Ma0

5199.405

15.46

<0.001

ω0 = 0.136, ω1 = 1, ω2 = 1

 
 

E.electricus

Ma

5191.521

  

ω0 = 0.136, ω1 = 1, ω2 = 381.189

37-0.998**, 106–0.982*, 108–0.960*, 109–0.993**, 117–0.944

  

Ma0

5195.127

7.212

0.007

ω0 = 0.132, ω1 = 1, ω2 = 1

 
 

S.elegans

Ma

5201.909

  

ω0 = 0.142, ω1 = 1, ω2 = 999

38-0.933

  

Ma0

5204.687

5.556

0.018

ω0 = 0.141, ω1 = 1, ω2 = 1

 
 

Last common ancestor of gymnotiform

Ma

5199.339

  

ω0 = 0.143, ω1 = 1, ω2 = 60.065

12-0.986*

  

Ma0

5204.040

9.402

0.002

ω0 = 0.141, ω1 = 1, ω2 = 1

 

Ngb

S.macrurus

Ma

2223.853

  

ω0 = 0.063, ω1 = 1, ω2 = 189.298

150-0.989*

  

Ma0

2226.360

5.014

0.025

ω0 = 0.063, ω1 = 1, ω2 = 1

 
  1. Note: *: posterior probability (pp) >95%; **: pp >99%