title: Fatty acid composition of adipose tissue and muscle from Jersey steers was affected by finishing diet and tissue location.
abstract: To determine the impacts of finishing diet and tissue type and location on fatty acid composition and palatability of Jersey beef, twenty steers were assigned to a factorial treatment design with initial weight (Light vs. Heavy) and finishing diet (70 vs. 85% concentrate) as treatments. Ribeye steaks were collected for sensory evaluation. Muscle, seam and subcutaneous (s.c.) fat from steaks, kidney fat (KF) and omental fat (OMF) were collected for fatty acid analysis. Initial weight and finishing diet had little impact on beef palatability. The 85% concentrate decreased polyunsaturated fatty acids (PUFA) in muscle and increased trans fatty acids in all tissues (P<0.05). The monounsaturated:saturated fatty acid ratio (MUFA:SFA) was highest in s.c. fat, intermediate in muscle and seam fat, and lowest in KF and OMF. The PUFA:SFA was highest in muscle, intermediate in s.c. and seam fat, and lowest in KF and OMF. Fatty acid composition differed greatly among tissues and the lower concentrate diet increased omega-3 and PUFA percentages in muscle.
authors.affiliation: Department of Animal Sciences, Washington State University, Pullman, WA 99164-6310, USA.
authors.forename: T
authors.initials: T
authors.lastname: Jiang
authors.forename: C J
authors.initials: CJ
authors.lastname: Mueller
authors.forename: J R
authors.initials: JR
authors.lastname: Busboom
authors.forename: M L
authors.initials: ML
authors.lastname: Nelson
authors.forename: J
authors.initials: J
authors.lastname: O'Fallon
authors.forename: G
authors.initials: G
authors.lastname: Tschida
mesh_terms: D000273:Adipose Tissue / Q000737:chemistry*; D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002417:Cattle; D004032:Diet; D004041:Dietary Fats; D005227:Fatty Acids / Q000032:analysis*; D005229:Fatty Acids, Monounsaturated / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis; D007668:Kidney / Q000737:chemistry; D008297:Male; D008460:Meat / Q000032:analysis*; D018482:Muscle, Skeletal / Q000737:chemistry*; D009852:Omentum / Q000737:chemistry; D009929:Organ Size; D050151:Subcutaneous Fat / Q000737:chemistry; D044242:Trans Fatty Acids / Q000032:analysis
chemical_list: D004041:Dietary Fats; D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D005231:Fatty Acids, Unsaturated; D044242:Trans Fatty Acids