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Title: Genomic estimation of additive and dominance genetic variation and their effect on the accuracy of genomic prediction of sheep
Contributor(s): Moghaddar, Nasiroddin  (author); Van Der Werf, Julius H  (author)orcid 
Publication Date: 2014
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Abstract: Additive and dominance variance of weaning weight (WWT) and post weaning weight (PWWT) for purebred Merinos and crossbreds of Merino and other breeds were estimated. Additive and dominance genomic relationships were calculated based on 48,599 SNP marker genotypes. Dominance variation was 3.61% and 5.58% of phenotypic variance for WWT and PWWT, respectively in purebreds and 9.2% and 17.1% for WWT and PWWT in crossbreds. The likelihood of the model was improved by including dominance effects, particularly for crossbred data. The accuracy of within breed genomic breeding value based on prediction from purebreds was similar for additive and additive plus dominance model but showed between 0.3% and 2.1% increase based on prediction from crossbreds and using additive plus dominance model. Fitting both additive and dominance effects of marker genotypes provides either similar or higher GBV accuracy depending on the value of dominance variance.
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) (Genetic Improvement Programs: Selection using molecular information), p. 1-3
Publisher: American Society of Animal Science
Place of Publication: Champaign, United States of America
Field of Research (FOR): 070201 Animal Breeding
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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