Breeding two animals together that have no common ancestry. Compare to Inbreeding and Linebreeding. For more information: Inbreeding vs. Linebreeding.

mating two individuals of the same breed that are sufficiently unrelated that the IC of the progeny is lower than the average of the parents.

The breeding of one registered breed to another, resulting in a registerable hybrid breed. Also refers to the breeds allowable in the background of a registered hybrid breed.

The act of maintaining genetic variability in mutant animal populations by means of breeding into the population unrelated animals and later recovering the recessive traits in the F2 generation.

A cross of different genotypes usually under natural conditions. This may also refer to cross-pollination.

Cross-pollination, or fertilization of flowers on a plant by pollen from another plant.

an inbreed crossed with a less related.

The transfer of genetic information among plants, generally through pollen. Outcrossing occurs for all plants whether genetically modified or not.