Hybridization (plant genetics)
The mating of two plants from different species or genetically very different members of the same species to yield hybrids (first filial hybrids) possessing some of the characteristics of each parent. Those (hybrid) offspring tend to be more healthy, productive, and uniform than their parents-- a phenomenon known as "hybrid vigor". Hybrids can also arise from more than two ("parent") species.
Hybrid corn/maize seed was first commercialized (in the United States) in 1922. Other recently-created crop hybrids include tangelos (produced by crossing grapefruit with tangerines), nectarines (bred from peaches), brocciflower (produced by crossing broccoli with cauliflower), etc.