Migration rate | ρ/θ in C.I. | ||
---|---|---|---|
6.25 × 10^{−6a} | 0.27 | 0.24 | 73 |
6.25 × 10^{−6b} | 0.40 | 0.25 | 86 |
2.5 × 10^{−5a} | 0.63 | 0.46 | 96 |
2.5 × 10^{−5b} | 0.40 | 0.29 | 91 |
2.5 × 10^{−4a} | 0.48 | 0.33 | 96 |
2.5 × 10^{−4b} | 0.43 | 0.37 | 97 |
Shown are the median of the MLE of ρ/θ; g, the proportion of times the MLE is within a factor of 2 of the truth; and coverage properties for the ~95% confidence interval for ρ/θ under population growth. Samples were simulated under a two-island model, with a diploid population size of 10,000 on each island, with migration rates of 6.25 × 10^{−6}, 2.5 × 10^{−5}, and 2.5 × 10^{−4} (these represent the fraction of each generation that are migrants).
↵^{a} Twenty-five chromosomes sampled from each population.
↵^{b} Fifty chromosomes sampled from a single population. Results are based on 100 simulated samples from each model, with r = μ = 2.5 × 10^{−5}, so the true value of ρ/θ = 1.