Battacone, Gianni and Nudda, Anna and Manca, Maria Grazia and Dimauro, Corrado and Pulina, Giuseppe (2009) Effect of diet enriched with rapeseed or sunflower oil on fatty acid profile of backfat and intramuscular fat in gilts. In: ADSA-CSAS-ASAS Joint Annual Meeting, July 12-16, 2009, Montreal, Quebec, Canada. [S.l.], American Dairy Science Association. p. 489. ISSN 0022-0302. Conference or Workshop Item.
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An experiment was carried out in order to study the fatty acid profile in the backfat and intramuscular fat from carcasses of gilts fed diets enriched with either rapeseed or sunflower oils for the last 4 weeks before slaughter. Twenty Landrace x Large White crossbred gilts were allotted to one of two experimental diets obtained by adding either rapeseed oil (RSO) or sunflower oil (SFO) to the commercial feed (at 2%). Fatty acid composition of Longissimus muscle (Lm) and backfat (Bf) of each carcass was quantified. Both tissues of RSO pigs had a higher percentage of C18:3n3 (1.15 vs 0.95%; P<0.01) and a lower n6/n3 ratio (13.9 vs 15.9; P<0.01) than those fed SFO. On the contrary, the fat of pigs fed SFO had a higher content of C14:0, C16:0 and C16:1 (P<0.05). The dietary oil did not affect (P=0.38) the CLAc9,t11 content in both tissues (0.11 vs 0.10% in RSO and SFO, respectively). The content of MUFA was higher in Lm than in Bf (48.0 vs 42.1%; P<0.01), due to its higher concentration of C18:1c9 and C16:1. The CLAc9,t11 concentration was higher in Bf than in Lm(0.12 vs 0.09%; P<0.05). The PUFA content was higher in Bf than in Lm (21.0 vs 15.0%; P<0.01). Our data confirmed that: i) it is possible to modify the fatty acid composition of pork meat by altering the source of fat in the diet; ii) the adipose tissues from Lm and Bf of pig differ for their fatty acid composition.
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