Out-crossing or out-breeding is the technique of crossing between different breeds. This is the practice of introducing unrelated genetic material into a breeding line. ... With recessive traits, outcrossing allows for the recessive traits to migrate across a population.

What do you mean by outcrossing?

: the interbreeding of individuals or stocks that are relatively unrelated (as to improve expression of a desired genetic trait) : outbreeding.

What is outcrossing in plants?

To pollinate (a plant) with pollen from a different plant of the same species, often one that is unrelated or is of a different variety. To outcross a plant or animal.