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Published online by Cambridge University Press: 23 November 2017
In Belgium, sport horse breeding is organized by the Belgian Warmblood Horse (BWP) studbook and the Belgian Sport Horse (sBs) studbook. Genetic links between both populations have been suspected because BWP and sBs studbooks had concomitant development after the Second World War, because they are geographically close, and because they have the same selection objectives (model, jumping and dressage ability). The conservation of genetic variability between breeds is important, even in selected populations, in order to allow a long term management of the entire genetic resources available for future improvements. The purpose of this study was to evaluate the genetic links between BWP and sBs populations by the study of their comparative genetic variability. Some studies already dealt with a similar problem (Moureaux et al., 1996; Valera et al., 2005).