title: Effect of whole linseed and rumen-protected conjugated linoleic acid enriched diets on feedlot performance, carcass characteristics, and adipose tissue development in young Holstein bulls.
abstract: Forty-eight young Holstein bulls (slaughtered at 458.6±9.79 kg body weight) were used to evaluate the effect of whole linseed and conjugated linoleic acid (CLA) supplementation on animal performance, adipose tissue development, and carcass characteristics. The animals were fed with one of four isoenergetic and isoproteic diets: control (0% linseed, 0% CLA), linseed (10% linseed, 0% CLA), CLA (0% linseed, 2% CLA), and linseed plus CLA (10% linseed, 2% CLA). Animal performance and carcass characteristics were unaffected by diet composition. Adding linseed or CLA to the concentrate diet did not result in significant differences in adipocyte size and number or lipogenic enzyme activity. However, while the frequency distribution of subcutaneous adipocyte diameters followed a normal distribution, the frequency distribution of intramuscular adipocyte diameters was not normal in any dietary group (skewness coefficients: 0.8, 1.2, 0.9, 0.8 for control, linseed, CLA, and linseed plus CLA, respectively; P<0.05), indicative of adipocyte proliferation in the intramuscular adipose tissue.
authors.affiliation: Centro de Investigación y Tecnología Agroalimentaria (CITA), Gobierno de Aragón, Avda. Montañana 930, 50059 Zaragoza, Spain. palberti@aragon.es
authors.forename: P
authors.initials: P
authors.lastname: Albertí
authors.forename: I
authors.initials: I
authors.lastname: Gómez
authors.forename: J A
authors.initials: JA
authors.lastname: Mendizabal
authors.forename: G
authors.initials: G
authors.lastname: Ripoll
authors.forename: M
authors.initials: M
authors.lastname: Barahona
authors.forename: V
authors.initials: V
authors.lastname: Sarriés
authors.forename: K
authors.initials: K
authors.lastname: Insausti
authors.forename: M J
authors.initials: MJ
authors.lastname: Beriain
authors.forename: A
authors.initials: A
authors.lastname: Purroy
authors.forename: C
authors.initials: C
authors.lastname: Realini
mesh_terms: D000273:Adipose Tissue / Q000187:drug effects / Q000254:growth & development*; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001823:Body Composition / Q000187:drug effects*; D002417:Cattle / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D004032:Diet / Q000662:veterinary*; D019597:Flax / Q000737:chemistry*; D044243:Linoleic Acids, Conjugated / Q000737:chemistry / Q000494:pharmacology*; D008297:Male; D012417:Rumen / Q000502:physiology*
chemical_list: D044243:Linoleic Acids, Conjugated