Abstract

Climate change results in new challenges for livestock production and genetic adaptations are needed to avoid production losses. It is inadequate to merely store genes affecting adaptive traits in animal genetic resources. Adaptive traits must be implemented quickly within the commercial breeds or these breeds must be replaced with better adapted, possibly crossbred, populations. We performed a simulation study comparing different selection strategies applied to two subpopulations which were divergently selected for a production (PROD) or a fitness trait (FIT). The selection strategies were: 1) selection within PROD using BLUP; 2) selection within PROD using genomic selection; 3) crossbreeding between PROD and FIT using BLUP; 4) crossbreeding using genomic selection (GBLUPCB). The selection strategies resulted in different adaptive rates. GBLUPCB resulted in the quickest adaptation. However, further studies including other selection strategies and practical livestock breeding schemes are needed.

Bente Aspeholen Aby, Theo HE Meuwissen

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Breeding objectives, economics of selection schemes, and advances in selection theory (Posters), , 394, 2014
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