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Utilization of Genomic Information in Livestock Improvement

Genomic information will increase selection efficiency in livestock. Genomics allows the tracing of transmission of genome fragments between generations, and the location and identification of genes whose polymorphisms partially explain quantitative trait variability. This information is useful for a better evaluation of the genetic values used by breeders, in particular when traits cannot be measured on a large scale for technical and/or economic reasons. It is also useful for reducing the generation interval through an early choice of breeding animals, and for increasing selection intensity. The first applications with regard to quality products and disease resistance are described in ruminant species. Interactions between genomic and reproductive biotechnologies are also described.