TABLE 1 

Comparison of molecular clock models and relative substitution rates using either 7 housekeeping gene sequences or 253 conserved protein sequencesa

TreedfClade(s) with distinct rate(s)LRNull (−lnL0)Alternative
(−lnLA)
PbRelative
substitution rate
Housekeeping1Anglerfish symbionts269.8733,576.0433,441.110.0000*3.5
1Flashlight fish symbionts264.1833,576.0433,443.950.0000*2.5
Protein1Anglerfish symbionts488.8157,332.2657,087.860.0000*4.8
1Flashlight fish symbionts340.6357,332.2657,161.950.0000*2.4
Housekeeping1E. calviensis and E. norvegicus12.2633,576.04−33,569.910.0005*0.7
Protein1E. calviensis and E. norvegicus55.5957,332.26−57,304.470.0000*0.6
Housekeeping1Grimontia033,576.04−33,576.041.00000.6
Protein1Grimontia8.5457,332.26−57,327.990.0040*0.7
Housekeeping1Aliivibrio033,576.04−33,576.041.00000.6
Protein1Aliivibrio80.4457,332.26−57,292.050.0000*0.6
Housekeeping1Photobacterium126.5233,576.04−33,513.780.0000*0.5
Protein1Photobacterium96.0457,332.26−57,284.250.0000*0.6
  • a Abbreviations: df, degrees of freedom; LR, likelihood ratio; −lnL0, log likelihood null model; −lnLA, log likelihood alternative model.

  • b *, significant likelihood ratio test result.