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. 2004 Dec;168(4):2049–2058. doi: 10.1534/genetics.104.030890

TABLE 4.

Maximum-likelihood estimates of ω (dN/dS ratio) of mtDNA genes inD. recens,D. subquinaria, andD. quinaria lineages, using model F3X4 of PAML (Yang 1997)

Model Parameter estimates ln L 2(Δ ln L)
One ratio ω = 0.020 −13328.47 —
Two ratiosa ω = 0.012quin+subquin, ω = 0.033recens −13324.29 8.36 P = 0.004, d.f. = 1
Three ratiosa ω = 0.011quinaria, ω = 0.032recens, ω = 0.015subquinaria −13324.17 0.24 P = 0.63, d.f. = 1
a

In the one-ratio model all lineages have the same ω-ratio. In the two-ratio model the non-D. recens and D. recens lineages have separate ω-ratios (ωquin+subquin and ωrecens, respectively). For the three-ratio model, each species has a separate ω-ratio.