A selection scheme to improve reproductive traits in the Rasa Aragonesa breed is presented. Implementation of this scheme will be carried out by the producers co-operative 'Carne Aragón SCL' in conjunction with technical support from regional and national Agricultural Research Institutions. The selection scheme is based on records from commercial flocks, using AI (Artificial Insemination) and BLUP animal model predictions of genetic merits as selection criteria. A threshold model is assumed and compared to linear models. Genetic evaluations using linear models were found to produce similar ranking of animals as those obtained with non-linear models.