Across-flock genetic evaluation in Australian Merinos has developed through (1) commercial product evaluation to provide commercial producers with production information on alternative ram sources and (2) central test sire evaluation to provide ram breeders with breeding values of sires from many sources. The constraints of these systems are the time delay in assessing average merit of ram sources and the limited numbers of sires that can be centrally progeny tested. While an across-flock evaluation scheme relying on on-farm data can be implemented or expanded, its utility will be restricted by inadequate pedigree recording within flocks and genetic links across flocks. Opportunities to reduce these limitations are reviewed.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 24: Sheep and goats (fibre); sheep and goats (meat and milk); poultry; horses; buffaloes., , 3–10, 1998
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