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Title: Effects of selection accuracy, risk and young ewe fertility on breeding program design
Contributor(s): Newton, Joanna E  (author)orcid ; Brown, Daniel  (author); Swan, Andrew  (author); Dominik, Sonja  (author)orcid ; Van Der Werf, Julius H  (author)orcid 
Publication Date: 2014
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Abstract: Selecting breeding animals at younger ages reduces generation interval, but also increases risk for long term profit because selection is less accurate and for management decisions because there is more variation in early reproductive performance of ewes. This study simulated different flock age structures and young ewe fertility levels in Merino breeding programs and compared average genetic gain and variation in genetic gain. Genetic gain increased by 18% when ewe fertility at 1 year of age increased from 10% to 90%. Age structure mainly influenced the risk of a particular breeding program design, as measured by increased variation in outcomes. Early selection in one or both sexes increased risk due to low accuracy of selection. The recent advent of breeding values utilizing genomic information presents opportunities to increase selection accuracy at younger ages and reduce the risk associated with early selection.
Publication Type: Conference Publication
Conference Name: WCGALP 2014: 10th World Congress on Genetics Applied to Livestock Production, Vancouver, Canada, 17th - 22nd August, 2014
Conference Details: WCGALP 2014: 10th World Congress on Genetics Applied to Livestock Production, Vancouver, Canada, 17th - 22nd August, 2014
Source of Publication: Proceedings of the 10th World Congress on Genetics Applied to Livestock Production (WCGALP) (Species Breeding: Sheep and goats (Posters)), p. 1-3
Publisher: American Society of Animal Science
Place of Publication: Champaign, United States of America
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 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)
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