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Genetic and phenotypic correlations between triacylglycerol fatty acids at weaning and slaughter in beef cattle

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Malau-Aduli, AEO and Siebert, BD and Bottema, CDK and Pitchford, WS (1998) Genetic and phenotypic correlations between triacylglycerol fatty acids at weaning and slaughter in beef cattle. In: J.A.M. van Arendonk (Editor), Book of Abstracts of the 49th Annual Meeting of the European Association for Animal Production, Warsaw, Poland, 24-27 August 1998, 4 (Series). p. 16. ISSN 1382-6077

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Abstract

Predicting fatty acid composition of beef cattle at slaughter using weaner data would enable an early selection decision thereby saving time and costs associated with progeny testing. The aim of this study was to examine genetic and phenotypic correlations between triacylglycerol fatty acid composition at weaning and slaughter. Subcutaneous fat between the 12th and 13th rib interface was biopsied from 324 weaner calves sired by Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon and Wagyu. Fat from the same anatomical site was sampled from their carcasses at slaughter and analysed for fatty acids by gas-liquid chromatography. Statistical analysis was by Mixed Model and Maximum Likelihood procedures of Harvey (1990) after adjusting for genotype, sire nested within genotype, sex and location. Results indicated strongly positive genetic correlations between biopsy and carcass stearate (18:0), oleate (18:1n-9), total monounsaturated fatty acids (MUFA) and delta-nine desaturase enzyme index of 0.84, 0.99, 0.93 and 0.82 respectively. However, biopsy and carcass palmitate (16:0) had a low genetic correlation of 0.15. Phenotypic correlations were relatively low and ranged from 0 to 0.67. The highly significant genetic correlations obtained suggest that selection decisions for fatty acid composition in the adipose tissue of cattle could be made at weaning.

Item Type: Article
Journal or Publication Title: In: J.A.M. van Arendonk (Editor), Book of Abstracts of the 49th Annual Meeting of the European Association for Animal Production, Warsaw, Poland, 24-27 August 1998
Page Range: p. 16
ISSN: 1382-6077
Date Deposited: 07 Jul 2009 00:54
Last Modified: 18 Nov 2014 04:01
URI: http://eprints.utas.edu.au/id/eprint/8820
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