Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20112
Title: Detailed phenotyping identifies genes with pleiotropic effects on body composition
Contributor(s): Bolormaa, Sunduimijid (author); Hayes, Ben J (author); Van Der Werf, Julius H  (author)orcid ; Pethick, David W (author); Goddard, Michael E (author); Daetwyler, Hans D (author)
Publication Date: 2016
Open Access: Yes
DOI: 10.1186/s12864-016-2538-0Open Access Link
Handle Link: https://hdl.handle.net/1959.11/20112
Abstract: Background: Genetic variation in both the composition and distribution of fat and muscle in the body is important to human health as well as the healthiness and value of meat from cattle and sheep. Here we use detailed phenotyping and a multi-trait approach to identify genes explaining variation in body composition traits. Results: A multi-trait genome wide association analysis of 56 carcass composition traits measured on 10,613 sheep with imputed and real genotypes on 510,174 SNPs was performed. We clustered 71 significant SNPs into five groups based on their pleiotropic effects across the 56 traits. Among these 71 significant SNPs, one group of 11 SNPs affected the fatty acid profile of themuscle and were close to 8 genes involved in fatty acid or triglyceride synthesis. Another group of 23 SNPs had an effect on mature size, based on their pattern of effects across traits, but the genes near this group of SNPs did not share any obvious function. Many of the likely candidate genes near SNPs with significant pleiotropic effects on the 56 traits are involved in intra-cellular signalling pathways. Among the significant SNPs were some with a convincing candidate gene due to the function of the gene (e.g. glycogen synthase affecting glycogen concentration) or because the same gene was associated with similar traits in other species. Conclusions: Using a multi-trait analysis increased the power to detect associations between SNP and body composition traits compared with the single trait analyses. Detailed phenotypic information helped to identify a convincing candidate in some cases as did information from other species.
Publication Type: Journal Article
Source of Publication: BMC Genomics, v.17, p. 1-21
Publisher: BioMed Central Ltd
Place of Publication: United Kingdom
ISSN: 1471-2164
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 830310 Sheep - Meat
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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