Table 2

dN/dS (ω) ratios and likelihood ratio tests (LRT) for ERV genes in the family Suidae to test whether ω for internal branches are significantly less than 1.

Two-ratio model


Gene

Internal

branches (ω)

Terminal

branches (ω)

1

0

LRT1


gag

0.34

0.78

-3235.42

-3253.27

38**


pol

0.25

0.56

-5373.26

-5405.94

65**


env (class A)

0.30

1.04

-4271.15

-4306.51

70**


env (class B)

0.22

1.47

-2470.67

-2515.98

90**


ℓ = loge-likelihood

1 LRT = Likelihood ratio test, twice the difference of the log likelihoods[2Δℓ = 2(ℓ1-ℓ0)]

** Extremely significant (P < 0.01; χ12)

Nascimento et al. BMC Evolutionary Biology 2011 11:139   doi:10.1186/1471-2148-11-139

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