Estimated genetic trends for weaning weight in three Dorper lines with different selection criteria

A study was undertaken to compare the effectiveness of three different selection strategies in increasing weaning weight of a Dorper flock under natural conditions. Data were analysed by mixed model procedures. Direct selection for weaning weight under natural conditions proved to be effective. Selection on breed standards and selection on weaning weight under natural conditions combined with feedlot performance were not successful in increasing weaning weight. Only direct selection for weaning weight under natural conditions is therefore recommended.