Daniel R. Matute

The paper reports a recent invasion of P-elements into Drosophila yakuba, showing transient frequency changes and absence in sister species, suggesting horizontal gene transfer and hybridization effects.

The paper identifies a stable hybrid zone between Drosophila yakuba and D. teissieri, showing that maladaptive trait combinations and hybrid male sterility limit gene flow.

The paper investigates why reinforced gametic isolation in Drosophila yakuba is confined to hybrid zones, finding that it incurs costs like reduced male fertility that limit its spread.