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Table 2 Estimates of the proportion of adaptive substitutions

From: Inferring selection in the Anopheles gambiae species complex: an example from immune-related serine protease inhibitors

α model Par log(L) 2Δlog(L) χ2 p-value AIC Akaike weight αa αb
An. gambiae vs. An. melas
α = 0 29 -336.49    730.98 0.424 [0] [0]
α ~ (all loci) 30 -335.76 1.46 0.23 731.52 0.323 0.23 [0.23]
α ~ (control, serpin) 31 -335.66 0.19 0.91 733.33 0.131 0.18 0.25
α ~ (other, immune) 31 -335.73 0.06 0.97 733.46 0.123 0.24 0.07
An. arabiensis vs. An. melas
α = 0 29 -329.36    716.73 0.495 [0] [0]
α ~ (all loci) 30 -329.31 0.10 0.75 718.63 0.191 -0.05 [-0.05]
α ~ (control, serpin) 31 -328.07 2.48 0.29 718.15 0.243 -0.54 0.10
α ~ (other, immune) 31 -329.30 0.02 0.99 720.61 0.071 -0.03 -0.15
An. gambiae vs. An. merus
α = 0 34 -333.36    734.72 0.349 [0] [0]
α ~ (all loci) 35 -332.60 1.52 0.22 735.21 0.274 0.15 [0.15]
α ~ (control, serpin) 36 -331.59 2.02 0.36 735.18 0.277 0.34 0.03
α ~ (other, immune) 36 -332.60 0.00 1.00 737.21 0.101 0.15 0.17
An. arabiensis vs. An. merus
α = 0 34 -311.04    690.07 0.053 [0] [0]
α ~ (all loci) 35 -307.96 6.15 0.01 685.92 0.422 0.34 [0.34]
α ~ (control, serpin) 36 -307.22 1.48 0.48 686.44 0.325 0.47 0.25
α ~ (other, immune) 36 -307.71 0.50 0.78 687.42 0.200 0.36 0.10
  1. αa and αb are estimates of the proportion of adaptive substitutions in each of the two classes of gene (control/serpin or non-immune/immune, respectively), Par is the number of parameters in the model. Where the value of α is constrained by the model it is marked in square brackets. Negative values arise from an 'excess' of non-synonymous polymorphism, and could represent sampling error, or mildly deleterious polymorphisms [7]. AIC is the Akaike Information Criterion. The Akaike weighting can be interpreted as the weight of evidence in favour of the corresponding model, given the relative support for all the available models [52].