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Breed differences and heterosis in triacylglycerol fatty acid composition of bovine adipose tissue

journal contribution
posted on 2023-05-16, 14:58 authored by Malau-Aduli, AEO, Siebert, BD, Bottema, CDK, Pitchford, WS
Subcutaneous adipose tissues were biopsied in purebred Jersey (n = 17), purebred Limousin (n = 17) and reciprocal F 1 Jersey x Limousin crossbred (n = 33) calves at the age of 9-10 months. Triacylglycerol fatty acids were extracted and analysed for sex and breed differences. Heterosis, additive and maternal variances were estimated. All calves were pasturefed in a single management group and biopsied from the same anatomical site. Heifer calves had significantly higher proportions of palmitoleate, total mono-unsaturated fatty acids, desaturation index and lower stearate than steer calves. Significant breed differences were observed in that Limousin calves had the highest proportions of palmitate and total saturated fatty acids, whereas Jersey calves had the most palmitoleate and desaturation index. Dominance effects were evident in the proportions of palmitate, stearate, desaturation and elongation enzyme indices due to the observed highly significant heterosis effect. Myristate, palmitate and total saturated fatty acids were considered heritable due to the observed highly significant additive genetic effect.

History

Publication title

Journal of Animal Physiology and Animal Nutrition

Volume

83

Pagination

106-112

ISSN

0931-2439

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Blackwell Verlag GmbH

Place of publication

Germany

Repository Status

  • Restricted

Socio-economic Objectives

Other animal production and animal primary products not elsewhere classified

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