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Heterosis, sex and breed differences in the fatty acid composition of muscle phospholipids in beef cattle
journal contribution
posted on 2023-05-16, 14:58 authored by Malau-Aduli, AEO, Siebert, BD, Bottema, CDK, Pitchford, WSLongissimus dorsi muscle tissue was biopsied between the 12th and 13th ribs of 96 purebred Jersey, purebred Limousin and Jersey × Limousin crossbred calves at the age of 9-10 months. Fatty acids of the phospholipid fraction were extracted and analysed for sex and breed differences. Heterosis, additive and maternal variances were estimated. All calves grazed pasture in a single management group and were biopsied from the same anatomical site. Steer calves had significantly higher proportions of the 14:0, 14:1, 18:2, 20:3 fatty acids and less of the 16-di-methyl-acetal than heifer calves. Significant breed differences were observed: Limousin calves had the highest proportions of 16:0, 24:0 and saturated fatty acids (SFA), whereas Jersey × Limousin calves had the most 18:0 and elongation index. Dominant effects were evident in the proportions of 16:0, 18:0, SFA and elongation index. Additive genetic effects were significant in the proportions of 16:0, 18:0, 18: 1n-9, total SFA and desaturation and elongation indices. Combined maternal and additive effects were significant for long chain polyunsaturated fatty acids 18:2, 20:3 and 20:4.
History
Publication title
Journal of Animal Physiology and Animal NutritionVolume
83Pagination
113-120ISSN
0931-2439Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Blackwell Verlag GmbHPlace of publication
GermanyRepository Status
- Restricted