Prior distributions of the parameters used in the ABC analyses.

<p><b>Note:</b><i>N</i>_anc.: effective population size (<i>Ne</i>) of the ancestral population. <i>N</i>_Bus.: <i>Ne</i> of the Busia population. <i>N</i>_Ruk.: <i>Ne</i> of the Rukomeshi population. <i>N</i>_IAEA: <i>Ne</i> of the IAEA colony. <i>N</i>_col.Bus.: <i>Ne</i> of the unsampled colony of Busia origin. <i>N</i>_col.Ruk.: <i>Ne</i> of the unsampled colony of Rukomeshi origin. <i>NB_col.</i>_Bus.: <i>Ne</i> of the colony of Busia origin (IAEA in scenario 4 and unsampled in scenario 6) during the bottleneck associated with its establishment that started in 1975 lasted <i>BD</i>_col.Bus. generations. <i>NB_col.</i>_Ruk.: <i>Ne</i> of the colony of Rukomeshi origin (IAEA in scenario 5 and unsampled in scenario 6) during the bottleneck associated with its establishment that started at <i>T_col.Ruk.</i> and lasted <i>BD</i>_col.Ruk. generations. <i>NB</i>_cont.: <i>Ne</i> of the Busia population during the bottleneck associated with the tsetse control that started in 1991 and lasted <i>BD</i>_cont. generations. <i>T_anc.</i>: number of generations between present and the merge of the two potential source populations an unsampled ancestral population. <i>T_admix.</i>: date of the admixture. <i>ar</i>: admixture rate. GSM: Generalized Stepwise Mutation model. SNI: Single nucleotide indel mutations.</p>*<p>: see <a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002697#pntd.0002697.s003" target="_blank">Supplementary file S2</a> (Table S7 in <a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002697#pntd.0002697.s003" target="_blank">Supplementary file S2</a>) for a rationale.