Improvements in the Manchega genetic breeding programme.
1995
Jurado J.J. | Serrano M. | Perez Guzman M.D. | Montoro V.
In this paper we present the last works applied on the Manchega sheep breed genetic program. Those works deal with improvements of the evaluation model quality, estimation of variance components and selection response and extending part-lactation. The inclusion of the effect herd-mobile period, which supposes about a 45 per cent of the phenotypic traits variation, was the most important improvement of the evaluation model. Results about estimation of variance components are not definitive and depends on the method used. Projection factors for extending part-lactation were calculated. Results provide the possibility to extend incomplete lactation records if at least first and second test-day are known.
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