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Title: Single-Step Genetic Evaluations in the Australian Sheep Industry
Contributor(s): Brown, D J  (author); Swan, A A  (author); Boerner, V  (author); Li, L  (author); Gurman, P M  (author); McMillan, A J  (author); van der Werf, J H J  (author)orcid ; Chandler, H R (author); Tier, B  (author); Banks, R G  (author)
Publication Date: 2018
Open Access: Yes
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Open Access Link: Access Link
Abstract: The main benefit of genomic selection for Australian sheep is to increase the accuracy of estimates of genetic merit for hard to measure traits including carcass, adult wool and reproduction traits. An extensive genotyped reference population, combined with a significant number of genotyped and phenotyped animals from ram breeding flocks enables genomic predictions with improved accuracies. Genomically enhanced breeding values have now been transitioned from a mixture of blending and independent single-trait single-step methods into full multiple-trait single-step analyses covering most traits evaluated. Key challenges to achieve this were: weighting of pedigree and genomic information, achieving acceptable run times, and estimation of breeding value accuracy from genomic contributions. The new analyses have been shown to significantly improve the prediction of progeny performance across most traits. Future developments will evaluate alternate models for incorporating genomic information, ability to include genotyped animals without any pedigree and phenotypic information, and development of single-step analyses for reproduction traits.
Publication Type: Conference Publication
Conference Name: 11th World Congress on Genetics Applied to Livestock Production
Conference Details: World Congress on Genetics Applied to Livestock Production, Auckland, New Zealand, 10-16 February
Source of Publication: Proceedings of the World Congress on Genetics Applied to Livestock Production, v.11, p. 1-8
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 830310 Sheep - Meat
830311 Sheep - Wool
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication
School of Environmental and Rural Science

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