title: Influence of feeding soybean oil on conjugated linoleic acid content in beef.
abstract: Forty-eight steers were used to study the influence of feeding soybean oil (SO) on the conjugated linoleic acid (CLA) content of beef. Steers were fed either a control diet containing 954 g/kg of dry matter (DM) corn-based concentrate (CTL) or a control diet supplemented with SO at 20 (SO2) or 40 g/kg (SO4) of diet DM for 105 days. Adipose tissue samples were collected from the M. longissimus dorsi (LD) and from the M. semitendinosus (ST) on days 0 and 63 of the experiment. Adipose and muscle tissue samples were collected from the LD and ST immediately after slaughter. Feeding 40 g/kg of DM as SO increased the proportions of trans-C(18:1) in beef lipid as compared to CTL and SO2 treatments. The C(18:2) cis-9, trans-11 isomer of CLA as a proportion of total fat was not different in adipose and muscle across treatments. Supplementing SO increased C(18:2) trans-10, cis-12 CLA in adipose tissue of the LD. Supplementing high-grain finishing diets with SO is not an effective strategy to enhance the C(18:2) cis-9, trans-11 isomer of CLA in beef.
authors.affiliation: Department of Animal, Dairy and Veterinary Sciences, Utah State University, 4815 Old Main Hill, Logan, UT 84322-4815, USA. trdhiman@cc.usu.edu
authors.forename: Tilak R
authors.initials: TR
authors.lastname: Dhiman
authors.forename: Shahiduz
authors.initials: S
authors.lastname: Zaman
authors.forename: Kenneth C
authors.initials: KC
authors.lastname: Olson
authors.forename: Howard R
authors.initials: HR
authors.lastname: Bingham
authors.forename: Amy L
authors.initials: AL
authors.lastname: Ure
authors.forename: Michael W
authors.initials: MW
authors.lastname: Pariza
mesh_terms: D000273:Adipose Tissue / Q000737:chemistry; D000821:Animal Feed; D000818:Animals; D002417:Cattle; D004042:Dietary Fats, Unsaturated / Q000008:administration & dosage*; D044243:Linoleic Acids, Conjugated / Q000032:analysis*; D008297:Male; D008460:Meat / Q000032:analysis*; D018482:Muscle, Skeletal / Q000737:chemistry; D013024:Soybean Oil / Q000008:administration & dosage*
chemical_list: D004042:Dietary Fats, Unsaturated; D044243:Linoleic Acids, Conjugated; D013024:Soybean Oil