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Research article2012Peer reviewed

Dietary influence on the m. longissimus dorsi fatty acid composition of lambs in relation to protein source

Turner, Tyler D.; Karlsson, Linda; Mapiey, Cletos; Rolland, David C.; Martinsson, Kjell; Dugan, Michael E. R.

Abstract

Dietary lipid effect, as a consequence of protein supplement, on lamb m. longissimus dorsi fatty acid composition was investigated, with emphasis on biohydrogenation intermediates. Crossbred lambs (White Swedish Landrace x Texel) were fed a barley-based diet without (CON) or with protein supplements including peas (PEA), rapeseed cake (RC) or hempseed cake (HC). The HC diet resulted in the highest muscle 22:6n-3 proportion, with the RC diet being similar (P < 0.05). Protein supplement did not affect the c9,t11 conjugated linoleic acid (CLA) proportion, however the HC diet increased some minor CIA isomers, including t10,c12 CIA (P < 0.05). The t10-18:1 and total trans-18:1 were lowest for the RC diet (P < 0.05). likely relating to rumen conditions and precursor availability. The saturated, monounsaturated and branched-chain fatty acids were largely unaffected by protein supplement. In conclusion, feeding the RC diet lowered the t10-18:1 and total trans-18:1 in meat, and modestly increased 22:6n-3 content. The direction of these changes would be beneficial, making the RC diet the preferred protein supplement; however the magnitude of the changes in the present experiment may not be sufficient to have an impact on human health. (C) 2012 Elsevier Ltd. All rights reserved.

Keywords

Bio-functional fatty acids; Biohydrogenation; Hempseed cake; Peas; Rapeseed cake

Published in

Meat Science
2012, volume: 91, number: 4, pages: 472-477
Publisher: ELSEVIER SCI LTD

SLU Authors

  • Karlsson, Linda

    • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

  • Martinsson, Kjell

    • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

Global goals (SDG)

SDG2 Zero hunger

UKÄ Subject classification

Veterinary Science
Animal and Dairy Science

Publication identifier

  • DOI: https://doi.org/10.1016/j.meatsci.2012.02.034

Permanent link to this page (URI)

https://res.slu.se/id/publ/56652