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Heritabilities of triacylglycerol fatty acids from the adipose tissue of beef cattle at weaning and slaughter

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Malau-Aduli, AEO and Siebert, BD and Bottema, CDK and Deland, MPB and Pitchford, WS (1998) Heritabilities of triacylglycerol fatty acids from the adipose tissue of beef cattle at weaning and slaughter. In: 6th World Congress on Genetics Applied to Livestock Production, 11 January 1998, Armidale.

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Abstract

A first attempt at estimating the heritabilities of total saturated (SFA), monounsaturated (MUFA)and polyunsaturated (PUFA) fatty acids from the triacylglycerol fraction of adipose tissues is presented. The data were from subcutaneous fat biopsies of 324 weaner steers and heifers across 7 genotypes and 26 sires. These animals all went into the feedlot postweaning, but the carcases of 150 at slaughter were sampled for fatty acid analysis. Results showed that weaner SFA, MUFA and PUFA had heritability estimates of 15, 16 and 0% respectively. At slaughter, estimates of heritabilities were 23, 57 and 15% for SFA, MUFA and PUFA respectively. Since monounsaturated fatty acids are highly desirable given their cholesterollowering
ability, this study suggests that selective breeding for MUFA has a good prospect of making genetic progress given the high hL of 57%. A larger data set would shed more light on the precision and accuracy of the estimates presented since these are based on a small data set.

Item Type: Conference or Workshop Item (Paper)
Keywords: Heritability, fatty acids, triacylglycerols, adipose tissue, beef cattle.
ISSN: 186389 4543
Additional Information:

In Proceedings 6th World Congress on Genetics Applied to Livestock Production, The University of New England, Armidale, Australia, vol. 25, 181-184.

Date Deposited: 01 Feb 2008 01:01
Last Modified: 18 Nov 2014 03:27
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