Mode of inheritance of triacylglycerol fatty acids in beef adipose tissue

Malau-Aduli, A.E.O., Siebert, B.D., Bottema, C.D.K., and Pitchford, W.S. (1998) Mode of inheritance of triacylglycerol fatty acids in beef adipose tissue. In: Journal of Animal Science (76 Suppl 1) 593. p. 153. From: 1998 Joint Meeting of the American Dairy Science Association and the American Society of Animal Science, 1998, Denver, CO, USA.

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Subcutaneous adipose tissues were biopsied in 67 Jersey, Limousin and Jersey x Limousin calves at the age of 9-10 months.All calves were grass-fed in a single management group and biopsied from the same anatomical site. Triacylglycerol fatty acids were extracted and analysed by gas-liquid chromatography. Genetic effects of heterosis, additive and maternal variances were estimated to investigate the mode of inheritance of fatty acids, Sex and genotype differences were also examined. Heifer calves had significantly higher proportions of palmitoleate, total monounsaturated fatty acids, desaturase enzyme activity index and lower stearate than bull calves. Genotype differences were observed:Limousin calves had the highest proportions of palmitate and total saturated fatty acids, while Jersey calves had the most palmitoleate and desaturase enzyme activity index. The mode of inheritance of palmitate, stearate, desaturase and elongase enzyme indices was by dominance. Myristate, palmitate and total saturated fatty acids showed significant additive genetic effect. The study showed that triacylglycerol fatty acids are heritable. Hetero-sis can also be exploited in reducing the percentage of saturated fatty acids in beef by crossbreeding Limousin and Jersey cattle.

Item ID: 54982
Item Type: Conference Item (Abstract / Summary)
ISSN: 1525-3163
Date Deposited: 14 Aug 2018 04:02
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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