A stochastic model to study breeding schemes in a small pig population

Abstract A stochastic model was constructed to examine the time-course of production and reproduction traits and inbreeding coefficient of a pig nucleus breeding scheme for different population sizes. Traits were simulated at the animal level; the week was used as the unit of time. The model includes overlapping generations and continuous selection in boars and sows. Such a model allows the study of effects of population size and structure, size of founder population and different selection and mating systems on selection response and inbreeding coefficient. As an example, the model is applied to the situation of a sire line with 50 sows and 15 boars annually.

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