02925naa a2200313 a 450000100080000000500110000800800410001902400390006010000210009924501350012026000090025550004030026452015990066765000100226665300090227665300270228565300220231265300140233470000150234870000170236370000170238070000230239770000160242070000160243670000170245270000150246970000170248477301100250110512502020-05-04       2009    bl uuuu     u00u1 u    #d7 a10.1016/j.meatsci.2009.02.0022DOI1 aDE LA FUENTE, J.  aFatty acid and vitamin E composition of intramuscular fat in cattle reared in different production systems.h[electronic resource]  c2009  aArticle history: Received 5 March 2008 // Received in revised form 7 January 2009 // Accepted 2 February 2009. Acknowledgements: This work has been made possible by funding from the AECI(Agencia Española de Cooperación Internacional), the Spanish INIA(Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria) and the Uruguayan INIA (Instituto Nacional de Investigación Agraria).  aThe aim of this study was to evaluate the fatty acid composition of intramuscular fat and the vitamin E content of beef from different production systems. Four cattle production systems were used: cattle reared under intensive conditions and fed concentrate (INT1) from Spain, cattle raised at pasture and supplemented with concentrate (SUP1) from the United Kingdom, cattle raised at pasture and on corn silage (SUP2) from Germany and cattle reared under extensive conditions slaughtered at two and three years old (EXT2 and EXT3) from Uruguay. The highest proportion and content (mg per 100 g of muscle) of linoleic acid (C18:2n-6) and arachidonic acid (C20:4n-6) and the lowest saturated fatty acids (SFA) was found in INT1 beef. In contrast, beef reared under extensive conditions showed the highest proportion and content of linolenic acid (C18:3n-3), docosapentaenoic acid (DPA, C22:5n-3) and eicosapentaenoic acid (EPA, C20:5n-3), and SUP1 and SUP2 beef showed the highest level of palmitic acid (C16:0) and SFA. Beef from intensive system (INT1) had the lowest P/S (PUFA/SFA) ratio, whereas beef from extensive system (EXT2 and EXT3) had the lowest n-6/n-3 ratio. The results of the PCA (principal components analysis) of fatty acid composition showed that beef from intensive system (INT1) was clearly differentiated from the other meats and was located with the C18:2n-6 and C20:4n-6 and the n-6/n-3 ratio. EXT2 and EXT3 beef were located with C18:3n-3 and long chain fatty acids. Beef from extensive systems had the highest concentration of vitamin E (3.91 mg a-tocopherol/kg muscle)  aCARNE  aBEEF  aFATTY ACID COMPOSITION  aPRODUCTION SYSTEM  aVITAMIN E1 aDIAZ, M.T.1 aÁLVAREZ, I.1 aOLIVER, M.A.1 aFONT I FURNOLS, M.1 aSAÑUDO, C.1 aCAMPO, M.M.1 aMONTOSSI, F.1 aNUTE, G.R.1 aCAÑEQUE, V.  tMeat Science, Volume 82, Issue 3, July 2009, Pages 331-337. https://doi.org/10.1016/j.meatsci.2009.02.002