Table 1

Likelihood analysis of the usp sequence datasets of five extant insect groups
Model Drosophilidae Diptera Lepidoptera Tenebrionidae Blattaria
M1a LnL (np) -5649.5 (31) -6946.6 (25) -4376.2 (12) -2113.5 (10) -1945.6 (13)
ω0ω1 0.02 1.00 0.03 1.00 0.03 1.00 0.01 1.00 0.00 1.00
p0p1 0.98 0.02 0.98 0.02 0.95 0.05 0.99 0.01 0.99 0.01
M2a LnL (np) -5649.5 (33) -6946.6 (27) -4376.2 (14) -2113.5 (12) -1945.6 (15)
ω0ω1ω2 0.02 1.00 1.00 0.03 1.00 1.00 0.03 1.00 1.00 0.01 1.00 1.00 0.00 1.00 1.24
p0p1p2 0.98 0.01 0.01 0.98 0.01 0.01 0.95 0.03 0.02 0.99 0.01 0.00 0.99 0.01 0.00
M7 LnL (np) -5610.8 (31) -6859.5 (25) -4339.9 (12) -2112.9 (10) -1950.0 (13)
p q 0.16 5.05 0.40 10.7 0.15 2.58 0.06 3.13 0.01 0.31
M8 LnL (np) -5610.8 (33) -6857.1 (27) -4338.8 (14) -2112.9 (12) -1946 (15)
p q 0.16 5.05 0.43 12.9 0.16 2.85 0.06 3.13 0.02 2.09
ωs 1.00 1.00 4.46 1.00 1.00
ps 0.00 0.01 0.00 0.00 0.01
LRT (p-value) test of positive selection
M2a vs M1a 1 1 1 1 1
M8 vs M7 1 0.08 0.32 1 0.02

LnL: log likelihood. np: number of parameters. ω0, ω1, ω2: non-synonymous/synonymous rate ratio that characterize a negative, a neutral, and a positive selection regime, respectively (with corresponding proportions of sites p0, p1, p2). p and q: shape parameters of a β function describing the distribution of non-synonymous/synonymous rate ratios. ωs: ratio affecting a ps proportion of sites under positive selection in model M8. LRT: Likelihood ratio test.

Chaumot et al.

Chaumot et al. BMC Evolutionary Biology 2012 12:199   doi:10.1186/1471-2148-12-199

Open Data