Influence of feeding system on Longissimus thoracis et lumborum volatile compounds of an Iberian local lamb breed

The chemical composition and volatile profile of the Longissimus thoracis et lumborum muscle lambs reared in two distinct production systems (intensive extensive) was evaluated. For this, sixty-six for meat autochthonous Gallega Iberian breed were raised with concentrate grass intensive (30 animals) extensive (36 system, respectively, until 4–4.5 months age when they slaughtered. Subsequently, muscles excised determination (moisture, intramuscular fat, protein, ash percentages) substances. aftermaths obtained evidenced that moisture (75.90% 75.68%), fat (1.68% 1.76%), protein (20.62% 20.97%) contents not significantly (P > 0.05) affected by system. However, extensively-fed displayed a higher content (1.35% vs. 1.24%). Additionally, total also influenced feeding Despite hydrocarbons, acids, aldehydes, ketones, esters, ethers, furans, sulfur compounds, others < diet, being alcohol family only group system (1321.3 1211.3 AU × 104/g fresh muscle). Specifically, intensively-fed showed amounts all families apart from ketones (2215 2826 muscle) compounds (22.7 123.7 In addition, benzyl carbon disulfide proposed as appropriate biomarkers diets, while 1-butanone, 2-heptanone, furan, 2-penthyl indicated suitable tracers concentrate-based diets.