Table 1.
REAP IBD-Sharing-Probability Estimates for Population-Structure Setting 2
| Outbred Relationship |
δ0(Probability of IBD = 0) |
δ1(Probability of IBD = 1) |
δ2(Probability of IBD = 2) |
|||
|---|---|---|---|---|---|---|
| Theoretical Probability | REAP Estimate (SD) | Theoretical Probability | REAP Estimate (SD) | Theoretical Probability | REAP Estimate (SD) | |
| Self | 0 | 0 (0) | 0 | 0.007 (0.013) | 1 | 0.993 (0.013) |
| Parent-offspring pair | 0 | 0 (0) | 1 | 0.985 (0.020) | 0 | 0.015 (0.020) |
| Full siblings | 0.25 | 0.251 (0.019) | 0.5 | 0.494 (0.038) | 0.25 | 0.256 (0.028) |
| Second degree | 0.5 | 0.501 (0.026) | 0.5 | 0.485 (0.039) | 0 | 0.014 (0.019) |
| Third degree | 0.75 | 0.752 (0.030) | 0.25 | 0.236 (0.043) | 0 | 0.012 (0.017) |
| Fourth degree | 0.875 | 0.873 (0.032) | 0.125 | 0.116 (0.045) | 0 | 0.011 (0.017) |
| Unrelated: similar ancestry | 1 | 1.002 (0.032) | 0 | −0.003 (0.035) | 0 | 0.001 (0.004) |
| Unrelated: different ancestry | 1 | 0.980 (0.025) | 0 | 0.019 (0.025) | 0 | 0.001 (0.003) |
In the table, δ0, δ1, and δ2, are the probabilities that relationship types share 0, 1, and 2 alleles identical by descent, respectively. Results given in the table are the average REAP estimates for the IBD-sharing probabilities (and SDs) calculated with 10,000 simulated random SNPs for population-structure setting 2. The following abbreviations are used: IBD, identity by descent; REAP, relatedness estimation in admixed populations; and SD, standard deviation.