Table 2. Estimates of FST (upper diagonal) and its significance (lower diagonal) based on 20 microsetillite loci for 386 PST isolates representing worldwide geographically spaced populations.
| NW Europe | North America | South America | Mediterranean Region | Central Asia | South Africa | East Africa | Middle East | Nepal | Pakistan | China | |
| NW Europe | - | 0.039 | 0.001 | 0.420 | 0.380 | 0.498 | 0.500 | 0.380 | 0.370 | 0.410 | 0.390 |
| North America | 0.100 | - | 0.046 | 0.409 | 0.368 | 0.485 | 0.490 | 0.378 | 0.364 | 0.400 | 0.398 |
| South America | 0.410 | 0.100 | - | 0.435 | 0.396 | 0.514 | 0.511 | 0.393 | 0.379 | 0.416 | 0.405 |
| Mediterranean Region | 0.000 | 0.000 | 0.000 | - | 0.020 | 0.109 | 0.150 | 0.009 | 0.280 | 0.280 | 0.390 |
| Central Asia | 0.000 | 0.000 | 0.000 | 0.000 | - | 0.044 | 0.160 | 0.040 | 0.230 | 0.260 | 0.340 |
| South Africa | 0.000 | 0.000 | 0.000 | 0.010 | 0.190 | - | 0.229 | 0.160 | 0.298 | 0.314 | 0.419 |
| East Africa | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.600 | - | 0.140 | 0.380 | 0.280 | 0.540 |
| Middle-East | 0.000 | 0.000 | 0.000 | 0.020 | 0.000 | 0.000 | 0.000 | - | 0.260 | 0.250 | 0.360 |
| Nepal | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | - | 0.220 | 0.210 |
| Pakistan | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | - | 0.450 |
| China | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | - |
| F ST for aggressive strains | 0.420 | 0.408 | 0.434 | 0.000 | 0.010 | 0.099 | 0.150 | 0.010 | 0.270 | 0.270 | 0.390 |
| P-value for aggressive strains | 0.000 | 0.000 | 0.000 | 0.860 | 0.070 | 0.040 | 0.000 | 0.020 | 0.000 | 0.000 | 0.000 |
The lower two lines shows FST and its p-value for isolates representing the post-2000 emerged strains. Non-significant FST values (>0.01) are shown in bold.