TABLE 1

Maximum-likelihood parameter estimates for GstD1 and their significance

ModelNo. of parametersEstimates of parametersaln L2Δ(ln L)cP-value
M0: one ratio1ω0 = 0.04−2393.88
M1a: neutral1p0 = 0.94, p1 = 0.06−2353.24
ω0 = 0.02, ω1 = 1.00
M2a: positive selection3p0 = 0.93, p1 = 0.06, p2 = 0.01−2351.084.310.116
ω0 = 0.02, ω1 = 1.00, ω2 = 4.70
M3: discrete5p0 = 0.84, p1 = 0.15, p2 = 0.01−2335.11
ω0 = 0.01, ω1 = 0.25, ω2 = 3.38
M7: β2ω from β(0.10, 1.44)b−2341.55
M8: β and ω4p0 = 0.99, ω from β(0.11, 2.07)−2334.9413.220.0014
(p1 = 0.01) ω1 = 3.60
  • a The proportion of sites (p0, p1,…) estimated to have ω0, ω1, … .

  • b In M7 and M8 10 ω-values that are <1 are estimated from a β-distribution defined by β(x, y).

  • c Significance was assessed as two times the difference in log likelihoods of corresponding positive selection and neutral models.