Malau-Aduli, A.E.O., Siebert, B.D., Bottema, C.D.K., Deland, M.P.B., and Pitchford, W.S. (1998) Heritabilities of triacylglycerol fatty acids from the adipose tissue of beef cattle at weaning and slaughter. In: Proceedings of the 6th World Congress on Genetics Applied to Livestock Production (25) pp. 181-184. From: 6th World Congress on Genetics Applied to Livestock Production, 11-16 January 1998, Armidale, NSW, Australia.

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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 post-weaning, 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 cholesterol-lowering ability, this study suggests that selective breeding for MUFA has a good prospect of making genetic progress given the high heritability 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 ID:	54970
Item Type:	Conference Item (Presentation)
ISBN:	978-1-86389-454-8
Keywords:	heritability, fatty acids, triglycerols, adipose tissue, beef cattle
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Date Deposited:	29 Nov 2018 01:28
FoR Codes:	07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070201 Animal Breeding @ 100%
SEO Codes:	83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830301 Beef Cattle @ 100%
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