Figure 2.
Site-frequency-spectrum based coalescent analyses supports a model of divergence in isolation with house–Spanish migration upon secondary contact (a). Parameter estimates of divergence time, the species split date between the house and Spanish sparrow, effective population sizes and migration rates and their associated 95% CI, derived from non-parametric block bootstraps (b). Parameter abbreviations are TDOHI = timing of house/Spanish divergence, THOBA = timing of house/Bactrianus divergence, TEXP = timing of population expansion in house lineage, mHS = migration house to Spanish, mSH = migration Spanish to house, mBH = migration Bactrianus to house, mSS migration between Spanish admixed (SpA) and Spanish pure (SpP) populations, NAB = ancestral Bactrianus Ne, NANC = ancestral Ne, NAS = ancestral Spanish Ne, NBa = Bactrianus Ne, NHB = house/Bactrianus ancestral Ne, NHO = house Ne, NSPA = Spanish admixed Ne, NSpP = Spanish pure Ne.