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Estimates of genetic parameters for triacylglycerol fatty acids in beef cattle at weaning and slaughter


Malau-Aduli, AEO and Edriss, MA and Siebert, BD and Bottema, CDK and Deland, MPB and Pitchford, WS, Estimates of genetic parameters for triacylglycerol fatty acids in beef cattle at weaning and slaughter, Journal of Animal Physiology and Animal Nutrition , 83, (4-5) pp. 169-180. ISSN 0931-2439 (2000) [Refereed Article]

DOI: doi:10.1046/j.1439-0396.2000.00256.x


Adipose tissues from the 12th-13th rib interface were sampled at weaning (324 cattle) and slaughter (310 cattle). The animals were progeny from Hereford dams sired by Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon and Wagyu. Fatty acid composition of the triacylglycerol fraction at both stages was measured by gas-liquid chromatography. Estimates of heritability and genetic and phenotypic correlations at weaning and slaughter were computed by restricted maximum likelihood using a sire model in both univariate and multivariate analyses. Results indicated that generally, there were strong, positive genetic correlations between fatty acids at weaning and slaughter (as high as 0.98). Phenotypic correlations were however, low and poor (0.04-0.44). Heritability (h 2 ) estimates at weaning were low to moderate, ranging from 0-0.31. However, at slaughter, h 2 estimates were generally higher than at weaning: Stearate, oleate and total monounsaturates had h 2 estimates of 0.43, 0.37 and 0.40, respectively. Other carcass traits such as marbling score and melting point of fat had h 2 estimates of 0.20 and 0.52, respectively. Significant breed, sex and location differences in fatty acid composition were also observed at weaning and slaughter.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Animal production
Research Field:Animal reproduction and breeding
Objective Division:Animal Production and Animal Primary Products
Objective Group:Livestock raising
Objective Field:Beef cattle
UTAS Author:Malau-Aduli, AEO (Associate Professor Aduli Malau-Aduli)
ID Code:29544
Year Published:2000
Web of Science® Times Cited:11
Deposited By:Agricultural Science
Deposited On:2004-07-23
Last Modified:2009-11-23

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