When inbreeding depression occurs, a genetically unrelated individual is mated with the animal to introduce genetic variability and remove homozygosity. In this case either outbreeding or crossbreeding may be carried out. Is there any preference for either technique over the other? Out-breeding here refers to mating between two individuals in the same breed, but no recent common ancestors. Cross-breeding refers to mating between two individuals of different breeds entirely.
Inbreeding depression can be overcome by the following ways : 1. Out breeding- the breeding of animals which are unrelated to each other and do not have come ancestors for 4-6 generations 2. Out crossing- mating done with the animals osf same breed but after 4-6 generations 3. Cross breeding- superior male mated with superior female of another breed 4. Interspecific hybridisations- male and female animal of two different related species