This study aimed to investigate the influence of diet on sheep of different breeds reprodutoresgenótipos on the physical, chemical and sensory dae his flesh termination. Santa Inês and Dorper Somalis, distributed in two production systems, the termination native and cultivated pasture, 12 of each genótiporaças breeding, all males: 36 lambs, sons of female crossbred Santa Ines x Somalis with pure breeding three breeds were evaluated , whole and divided into two production systems. The animals had access to food and water ad libitum, and were sent to abatidose dias25 to reach approximately 180 kg live weight. It was determined, the longissimus muscle, the moisture, protein, lipid, ash, texture, weight loss by cooking, water holding capacity; cholesterol and fatty acid profile, as well as evaluating the sensory parameters of flavor, aroma, hardness, juiciness and overall acceptability. The genotype and production system influence the physical and chemical characteristics of lamb. The Somali group had lower levels of ash and lipids. The Dorper and St. Agnes animals yielded similar results, PPC (weight loss by cooking), the fatty acid C14: 0 (myristic) and C17: 0 (margaric) and overall acceptability. The cultivated pasture showed better results for protein, lipid, PPC (weight loss by cooking), WHC (water holding capacity), C16: 1 (palmitoleic), C18: 1n9c (oleic acid), C18: 1n9t (elaidic) AGM (monounsaturated fatty acid), HH (hipocolesterolemics hypercholesterolemic) and overall acceptability, and lower results for AGP (polyunsaturated fatty acid), AGP: AGS (polyunsaturated fatty acid), AGD (desirable fatty acid). AO genotype sire breed and production system influence the physical and chemical characteristics of lamb.
fatty acids; flavor; pasture; shear force