TABLE 4.
Poisson-calculated parameter estimates under nested likelihood models of domestication
| Contraction at fixed time (d.f. = 1)
|
Contraction at unknown time (d.f. = 2)
|
Bottleneck of fixed size (d.f. = 2)
|
Bottleneck of unknown size (d.f. = 3)
|
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Models | τ = fixed | ω = varied | P-value | τ = varied | ω = varied | P-value | τ = fixed | ω = varied | τB = varied | ωB = 0.1 | P-value | τ = fixed | ω = varied | τB = varied | ωB = varied | P-value |
| Uncorrected | 5,000 | 0.23 | 4.01 × 10−8 | 2,245 | 0.12 | 0.51 | 5,000 | 64.5 | 1,835 | 0.1 | 0.51 | 5,000 | 0.11 | 3,023 | 0.9 | 0.8 |
| Corrected | 5,000 | 0.25 | 2.27 × 10−5 | 16,193 | 0.38 | 0.11 | 5,000 | 2.5 | 2,591 | 0.1 | 0.03 | 5,000 | 1.8 | 2,159 | 0.08 | 0.1 |
See Table 2 for description of parameters. P-values were calculated from a likelihood-ratio test, where a P-value <0.05 indicates the alternative model fits the data better than the previous model. Null model: τ = ∞ and ω =1.