An independent validation association study of carcass quality, shear force, intramuscular fat percentage and omega-3 polyunsaturated fatty acid content with gene markers in Australian lamb

Knight, Matthew I., Daetwyler, Hans D., Hayes, Ben J., Hayden, Matthew J., Ball, Alex J., Pethick, David W. and McDonagh, Matthew B. (2014) An independent validation association study of carcass quality, shear force, intramuscular fat percentage and omega-3 polyunsaturated fatty acid content with gene markers in Australian lamb. Meat Science, 96 2: 1025-1033. doi:10.1016/j.meatsci.2013.07.008


Author Knight, Matthew I.
Daetwyler, Hans D.
Hayes, Ben J.
Hayden, Matthew J.
Ball, Alex J.
Pethick, David W.
McDonagh, Matthew B.
Title An independent validation association study of carcass quality, shear force, intramuscular fat percentage and omega-3 polyunsaturated fatty acid content with gene markers in Australian lamb
Journal name Meat Science   Check publisher's open access policy
ISSN 0309-1740
1873-4138
Publication date 2014-02
Sub-type Article (original research)
DOI 10.1016/j.meatsci.2013.07.008
Open Access Status Not yet assessed
Volume 96
Issue 2
Start page 1025
End page 1033
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Previous association studies revealed several single nucleotide polymorphisms (SNPs) that explained the observed phenotypic variation for meat tenderness and long-chain omega-3 polyunsaturated fatty acid (PUFA) content of Australian lamb. To confirm the validity of these associated SNPs at predicting meat tenderness and omega-3 PUFA content, an independent validation study was designed. The OvineSNP50 genotypes of these animals were used to impute the 192 SNP Meat Quality Research (MQR) panel genotypes on nearly 6200 animals from the Cooperative Research Centre for Sheep Industry Innovation Information Nucleus Flock and Sheep Genomics Falkiner Memorial Field Station flock. Association analysis revealed numerous SNP from the 192 SNP MQR panel that were associated with carcass quality - fat depth at the C-site and eye muscle depth; shear force at day 1 and day 5 after slaughter (SF1 and SF5); and omega-3 PUFA content at P<. 0.01. However, 1 SNP was independently validated for SF5 (i.e. CAST_101781475). The magnitude of the effect of each significant SNP and the relative allele frequencies across Merino-, Maternal- and Terminal-sired progeny was determined. The independently validated SNP for SF5 and the associated SNP with omega-3 PUFA content will accelerate efforts to improve these phenotypic traits in Australian lamb.
Keyword CAPN and CAST
Carcass quality
Independent validation association study
Intramuscular fat percentage
Omega-3 polyunsaturated fatty acids
Shear force
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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