F-statistic estimate | Maximum- likelihood estimate | ||||||
---|---|---|---|---|---|---|---|
No. loci | d/s | μ_{F} | σ_{F} | d_{F} | μ_{ML} | σ_{ML} | d_{ML} |
Samples at generations 0 and 4 | |||||||
5 | 74/1000 | 84 | 74 | 71 | 76 | 64 | 46 |
10 | 15/1000 | 75 | 61 | 10 | 67 | 49 | 5 |
15 | 4/1000 | 68 | 43 | 4 | 62 | 35 | 2 |
25 | 0/200 | 61 | 24 | 0 | 58 | 21 | 0 |
50 | 0/200 | 57 | 15 | 0 | 55 | 11 | 0 |
100 | 0/200 | 56 | 10 | 0 | 54 | 8 | 0 |
200 | 0/200 | 54 | 6 | 0 | 54 | 5 | 0 |
Samples at generations 0 and 8 | |||||||
5 | 44/1000 | 86 | 72 | 43 | 67 | 53 | 24 |
10 | 3/1000 | 72 | 46 | 3 | 60 | 33 | 1 |
15 | 0/1000 | 67 | 32 | 0 | 57 | 23 | 0 |
25 | 0/200 | 64 | 21 | 0 | 56 | 18 | 0 |
50 | 0/200 | 60 | 12 | 0 | 54 | 9 | 0 |
100 | 0/200 | 58 | 9 | 0 | 53 | 7 | 0 |
200 | 0/200 | 56 | 6 | 0 | 52 | 5 | 0 |
Samples at generations 0, 4 and 8 | |||||||
5 | 15/1000 | 76 | 57 | 14 | 60 | 42 | 7 |
10 | 2/1000 | 66 | 37 | 2 | 55 | 21 | 0 |
15 | 0/1000 | 63 | 24 | 0 | 54 | 16 | 0 |
25 | 0/100 | 63 | 20 | 0 | 54 | 12 | 0 |
50 | 0/100 | 59 | 10 | 0 | 53 | 7 | 0 |
100 | 0/100 | 59 | 8 | 0 | 53 | 6 | 0 |
200 | 0/100 | 57 | 5 | 0 | 52 | 4 | 0 |
Simulated populations had a true haploid size of N = 50. The first column indicates the number of diallelic markers in each sample. Initial allele frequencies for these loci were generated randomly from a uniform distribution. Samples of haploid size 100 were drawn with replacement. Runs were discarded if either estimate of population size was > 500. The number of runs discarded is d and the total number of runs for each simulation test is s. Note that the value of s varies between tests. For each estimator, we list the mean, μ, and the standard deviation, σ, of the estimates of population size from runs in which both estimators were < 500. d_{F} and d_{ML} are, respectively, the number of runs in which the F-statistic estimate or the maximum-likelihood estimate of N was > 500.