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) |
ℓ1 | ℓ0 | 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)