Factors affecting the concentration of short branched-chain fatty acids in sheep fat

L. Salvatore; D. Allen; K.L. Butler; D. Tucman; A. Elkins; D.W. Pethick; F.R. Dunshea

doi:10.1071/EA07037

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Factors affecting the concentration of short branched-chain fatty acids in sheep fat

Journal article

Peer reviewed

Factors affecting the concentration of short branched-chain fatty acids in sheep fat

L. Salvatore, D. Allen, K.L. Butler, D. Tucman, A. Elkins, D.W. Pethick and F.R. Dunshea

Australian Journal of Experimental Agriculture, Vol.47(10), pp.1201-1207

2007

DOI: https://doi.org/10.1071/EA07037

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Abstract

The concentration of short branched-chain fatty acids, specifically 4-methyloctanoic acid (MOA) and 4-methylnonanoic acid (MNA), in subcutaneous fat were determined in five genotypes (Poll Dorset × Border Leicester Merino, Poll Dorset × Merino, Poll Dorset muscling × Merino, Merino × Merino, Border Leicester × Merino) of Australian sheep. In total, 264 ewes and wethers, either 8 or 22 months of age, were selected for genotype, age and gender. These animals were sired by 16 rams that were selected for growth based on estimated breeding values (EBVs), except for one group (Poll Dorset muscling × Merino), which was selected for muscling based on EBVs. There was a strong relationship between the concentration of MOA and MNA at 8 and 22 months of age. There were no differences between lambs sired by Poll Dorset rams selected for muscling or growth. The 8- and 22-month-old Poll Dorset × Merino sheep had higher levels of MOA and MNA compared with the other genotypes (P < 0.001). At 8 months of age, the wethers had higher levels of MOA and MNA (P < 0.001) than the ewes of the same genotype. There was a strong relationship (P < 0.001) between MOA and MNA and the fat and lean percentage for 22-month-old ewes. Effects of sire, dam and slaughter day (at the same slaughter age) on MOA and MNA were also found. The results suggest that there is good feasibility for selection against animals at risk of possessing higher levels of short branched-chain fatty acids.

Details

Title: Factors affecting the concentration of short branched-chain fatty acids in sheep fat
Authors/Creators: L. Salvatore (Author/Creator) - Poultry CRC
D. Allen (Author/Creator) - Department of Primary Industries, 600–621 Sneydes Road, Werribee, Vic. 3030 Australia.
K.L. Butler (Author/Creator) - Department of Primary Industries, 600–621 Sneydes Road, Werribee, Vic. 3030 Australia.
D. Tucman (Author/Creator) - Department of Primary Industries, 600–621 Sneydes Road, Werribee, Vic. 3030 Australia.
A. Elkins (Author/Creator) - Department of Primary Industries, 600–621 Sneydes Road, Werribee, Vic. 3030 Australia.
D.W. Pethick (Author/Creator) - Murdoch University
F.R. Dunshea (Author/Creator) - The University of Melbourne
Publication Details: Australian Journal of Experimental Agriculture, Vol.47(10), pp.1201-1207
Publisher: CSIRO Publishing
Identifiers: 991005542668507891
Murdoch Affiliation: School of Veterinary and Biomedical Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.51 Dairy & Animal Sciences; 3.51.206 Meat Quality
Web Of Science research areas: Agriculture, Multidisciplinary
ESI research areas: Agricultural Sciences