Figure 4
(a) Map of the E–W (1-5-6-9), NW-S (1-13-17), and NE-S (9-13-17) transects used to detect breaks in gene flow. Locations with fewer than three samples were not included in these transects. Location 15 was not used as it digressed from the line, but there was no difference in the results when it was included. (b–d) (FST/(1−FST))/geographic distance as calculated for pairs of adjacent locations, plotted against the cumulative mid-pair distances, along the E–W, NW-S, and NE-S transects, respectively. The positions of the locations are indicated by their numbers at the top of each figure, in the order in which the transect connected the locations. The abscissa of the black points indicate the position, in terms of geographic distance, of the mid-points between the pairs of locations shown above them. The lines joining these points are only for visualization and do not imply any statistical trend. Only statistically significant FST's were used for the figures; a value of zero was used for FST's that were not significantly different from zero.
