- Inbreeding or consanguineous mating is mating between individuals related by descent or ancestry.
- The degree of inbreeding of an individual is expressed as inbreeding coefficient (F).
- When the individuals are closely related, e.g., in brother-sister mating or sib mating, the degree of inbreeding is high.
- Inbreeding depression may be defined as the reduction or loss in vigour and fertility as a result of inbreeding.
- Inbreeding depression = F1-F2 / F1 x 100
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