In horse populations, genetic markers are commonly used for exclusion procedures to assess the right sire and dam of the foal. However pedigree information is limited because the total genetic history of an animal or a population can not be traced from the beginning. This may introduce some discrepancy between the pedigree and reality. In this paper, we tried to analyse how genetic markers can help us to overcome these difficulties. All authors agree that estimators for pairwise relatedness or individual inbreeding coefficients need a lot of independent co-dominant marker loci where alleles are balanced in frequencies in order to reach enough accuracy in estimations. We show in this perspective that the development of a panel of numerous SNP satisfying these conditions and revealed by DNA chips would be a tool of great interest to address the problems connected with parentage and inbreeding in horse populations where the good management of pedigree information appears insufficient to do it.

B. Langlois

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 08.02, 2006
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