Table 4. Scaled estimates of divergence times (T) and migration rates (M1and M2).
| Philippines | Australia | Australia |
|---|---|---|
| Negrito | Arnhem Land | Great Sandy Desert |
| Aeta B | ||
| T | 19 710 (6540–74 258) | 15 350 (6184–73 101) |
| M1 | 0.072 (0.055–7.267) | 0.072 (0.042–9.587) |
| M2 | 1.690 (0.009–15.348) | 0.047 (0.009–12.852) |
| Aeta Z | ||
| T | 15 528 (4939–65 360) | 14 549 (5740–68 029) |
| M1 | 0.072 (0.054–8.275) | 0.073 (0.043–8.101) |
| M2 | 0.007 (0.003–7.729) | 0.008 (0.003–7.913) |
| Agta | ||
| T | 19 799 (9210–75 059) | 15 083 (6451–69 453) |
| M1 | 0.072 (0.056–6.548) | 0.074 (0.044–9.290) |
| M2 | 3.611 (0.327–18.094) | 1.897 (0.018–13.359) |
Scaled estimates of divergence times (T) and migration rates (M1 and M2) for Negrito groups and indigenous Australians with observed genetic associations. Analyses were based on Y-STR haplotype data (7 Y-STRs) using the IM program.28 Divergence times are in units of years while population migration rates (M1: from Negrito groups to Australian groups and M2: from Australian groups to Negrito groups) indicate the effective rate at which genes come into a population per generation. Credible intervals are in parenthesis. Posterior distributions for these parameter estimates (t, m1 and m2) are shown in Supplementary Figure 4.