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Effect of biotin supplementation on meat quality of F1 Wagyu/Black Angus feedlot steers of known genotype
Authors:Lawrence R J  Doyle J C  Elliott R  Norton B W  Loxton I
Affiliation:Schools of Veterinary Science and Animal Studies, University of Queensland, Qld. 4072, Australia; Integrated Animal Production, P.O. Box 1821, Toowoomba, Qld. 4350, Australia.
Abstract:Biotin (D-biotin) was supplemented to F1 Wagyu/Black Angus steers fed a wheat-based ration to evaluate the effect on meat quality. One hundred and eight steers of known Wagyu sire lines were assigned to three biotin treatments (0, 10 and 20mg/head/day) with each treatment replicated four times using an unfasted liveweight of 410.5kg (±24.42 SD). Biotin supplementation had no effect (P>0.05) on beef marbling standard at either the 5/6th or 10/11th rib quartering site, 10/11th rib intra-muscular fat percentage, intra-muscular fat fatty acid composition or adipose melting points. Wagyu genotype had an effect (P<0.05) on beef marbling standard and intra-muscular fat percentage at the 10/11th rib, inter-muscular and intra-muscular melting point and fatty acid composition of intra-muscular fat. A significant (P<0.001) but poor correlation existed between beef marbling standard and intra-muscular fat percentage (R(2)=0.198). Total conjugated linoleic acid had a highly significantly (P<0.0001) positive correlation to intra-muscular fat percentage (R(2)=0.446).
Keywords:Biotin  Wagyu  Marbling  Intra-muscular fat  Fatty acid composition
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