title: Extruded linseed and rapeseed both influenced fatty acid composition of total lipids and their polar and neutral fractions in longissimus thoracis and semitendinosus muscles of finishing Normand cows.
abstract: The effects of extruded linseed and rapeseed on lipids and FA composition of total, polar and neutral lipids of longissimus thoracis (LT) and semitendinosus (ST) muscles were investigated in 21 Normand cull cows. Animals were assigned in a 100 d finishing period to straw (30%) and concentrate (70%) based (C) or the same diet supplemented with linseed (L) or with rapeseed (66%) plus linseed (33%) (RL). Beef polar and neutral lipids were purified by liquid chromatography and their FA analysed by GLC. Trans and cis 18:1, purified by HPLC from total FA methyl esters, were analysed by GLC-MS. L and LR diets did not increase beef lipid deposition, but had modified FA composition of both LT and ST muscles in favouring deposition of 18:3n-3 and 9cis,11tr 18:2 (CLA), mainly to the detriment of 18:1∆9 cis (neutral lipids) and 18:2n-6 (polar lipids). However, they did not favour deposition of LC n-3 PUFA in the two muscles, but had increased deposition of trans 18:1 significantly, especially of ∆13tr to ∆16tr isoforms to the detriment of ∆10tr 18:1 (L diet) and of ∆11tr 18:1 (RL diet).
authors.affiliation: National Institute for Agronomic Research (INRA), UMR 1213 Herbivores, Research Centre of Clermont-Ferrand/Theix, F-63122 Saint-Genès-Champanelle, France; National Research-Development Institute for Biology and Animal Nutrition (IBNA), Balotesti, Romania.
authors.forename: Mihaela
authors.initials: M
authors.lastname: Habeanu
authors.forename: Agnès
authors.initials: A
authors.lastname: Thomas
authors.forename: Esperanza
authors.initials: E
authors.lastname: Bispo
authors.forename: Mylène
authors.initials: M
authors.lastname: Gobert
authors.forename: Dominique
authors.initials: D
authors.lastname: Gruffat
authors.forename: Denys
authors.initials: D
authors.lastname: Durand
authors.forename: Dominique
authors.initials: D
authors.lastname: Bauchart
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D029741:Brassica rapa / Q000737:chemistry*; D002417:Cattle; D004032:Diet / Q000662:veterinary; D004041:Dietary Fats / Q000008:administration & dosage / Q000032:analysis; D019587:Dietary Supplements; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage / Q000032:analysis*; D043371:Fatty Acids, Omega-6 / Q000008:administration & dosage / Q000032:analysis*; D019597:Flax / Q000737:chemistry*; D008297:Male; D008460:Meat / Q000032:analysis*; D018482:Muscle, Skeletal / Q000737:chemistry*
chemical_list: D004041:Dietary Fats; D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6
keywords: Fatty acid; Finishing cow; Linseed; Lipid; Muscle; Rapeseed