Hybridization between bees of African and US populations

Hybridization between bees of African and European descent in the New World has been one of the most dramatic evolutionary events of the 20th century. Although European bees have been present there since the the 16th century, African bees were not introduced until 1957. Following the release of the African bees, much of their genome swept rapidly through the European population, and much of Latin America was Africanized by the mid-1990s. This study uses historic data to examine selective patterns of simultaneous Africanization in two US populations.