Introgression despite minimal hybridization: mating system modulates phenotypic associations with introgression in Clarkia

Secondary contact between incipient species provides the opportunity to understand how trait divergence restricts gene flow. While mating system transitions are particularly common and involve a suite of phenotypic changes, the extent to which these changes influence gene flow during speciation is poorly understood. Using 410 genomes, we quantified introgression between selfing-outcrossing sister Clarkia taxa in four independent contact zones. We used common garden and geospatial data to determi