Importancia de la verificación-asignación de progenitores en sistemas extensivos de pie de cría

to assess the implications of parentage assignation on herds-genetic improvement nine microsatellite markers were used in order to structure the genealogy of a multisired braford herd. all progeny (100%) had satisfactory paternity assignment, conversely the maternity verification analysis showed assignation errors up to 90%. our results support the use of molecular tools to verify the pedigree structure in those herds with management systems that limit the proper registration of progeny at calving.