title: Effects of linseed oil and natural or synthetic vitamin E supplementation in lactating ewes' diets on meat fatty acid profile and lipid oxidation from their milk fed lambs.
abstract: Forty-eight Churra ewes with their new-born lambs were separated into four dietary treatments: Control (without added fat), LO (with 3% linseed oil), LO-Syn E (LO plus 400 mg/kg TMR of synthetic vitamin E) and LO-Nat E (LO plus 400 g/kg TMR of natural vitamin E). Linseed oil caused an increase in trans-11 C18:1 (VA), trans-10 C18:1, cis-9, trans-11 C18:2 (RA), trans-10, cis-12 C18:2 and C18:3 n-3 (ALA) in milk fat compared to the Control. The addition of vitamin E to the LO diets did not influence significantly the majority of milk fatty acids compared with the LO diet alone. Trans-10 C18:1, VA, RA, trans-10, cis-12 C18:2 and LA levels were higher in intramuscular lamb fat from treatments with linseed oil. No statistically significant differences were observed in these FA due to vitamin E supplementation or the type of vitamin E (synthetic vs. natural). Vitamin supplementation resulted in lipid oxidation levels below the threshold values for detection of rancidity in lamb meat.
authors.affiliation: Área de Producción Animal, Departamento de Ciencias Agroforestales, ETS Ingenierías Agrarias, Universidad de Valladolid, 34004 Palencia, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Gallardo
authors.affiliation: Dipartimento di Agraria, Sezione di Scienze Zootecniche, University of Sassari, 07100 Sassari, Italy.
authors.forename: M G
authors.initials: MG
authors.lastname: Manca
authors.affiliation: Instituto de Ganadería de Montaña (CSIC-ULE), 24346 Grulleros, León, Spain.
authors.forename: A R
authors.initials: AR
authors.lastname: Mantecón
authors.affiliation: Dipartimento di Agraria, Sezione di Scienze Zootecniche, University of Sassari, 07100 Sassari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Nudda
authors.affiliation: Área de Producción Animal, Departamento de Ciencias Agroforestales, ETS Ingenierías Agrarias, Universidad de Valladolid, 34004 Palencia, Spain. Electronic address: tmanso@agro.uva.es.
authors.forename: T
authors.initials: T
authors.lastname: Manso
mesh_terms: D052436:Adipose Tissue, White / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D000818:Animals; D017849:Animals, Inbred Strains; D004032:Diet / Q000662:veterinary*; D004041:Dietary Fats / Q000008:administration & dosage / Q000032:analysis / Q000378:metabolism; D002149:Energy Intake; D005227:Fatty Acids / Q000032:analysis / Q000378:metabolism; D005260:Female; D063427:Food Quality; D007774:Lactation; D008043:Linseed Oil / Q000008:administration & dosage* / Q000378:metabolism; D008297:Male; D039382:Maternal Nutritional Physiological Phenomena; D008460:Meat / Q000032:analysis*; D008892:Milk / Q000737:chemistry; D018482:Muscle, Skeletal / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D010084:Oxidation-Reduction; D011247:Pregnancy; D034561:Sheep, Domestic; D013030:Spain; D014810:Vitamin E / Q000008:administration & dosage* / Q000737:chemistry / Q000378:metabolism; D015430:Weight Gain
chemical_list: D004041:Dietary Fats; D005227:Fatty Acids; D014810:Vitamin E; D008043:Linseed Oil
keywords: Fatty acid; Linseed oil; Meat; Milk; Suckling lamb; Vitamin E