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Effect of production system before the finishing period on carcass, meat and fat qualities of beef Guerrero, A. Sañudo, C. Albertí, P. Ripoll, G. Campo, M. M. Olleta, J. L. Panea, B. Khliji, S. Santolaria, P. Indústries Alimentàries Qualitat i Tecnologia Alimentària 663/664 Twenty Gascon young bulls that had been reared either in intensive conditions (INT) (n = 10) with early weaning at 3 to 4 months, or in a traditional extensive (EXT) system (n = 10) with weaning at 7 months, were subjected to the same conditions during the 145-day finishing period. Production system before the finishing period did not affect conformation, dressing percentage or morphology of the carcass; nevertheless, tissue composition differed somewhat between the two groups. Display had a stronger effect on meat colour than did production system. Percentage of myoglobin was highest in INT (P ⩽ 0.001), although meat texture and sensory quality did not differ between rearing conditions. EXT animals had darker, more yellow fat, a higher percentage of n-3 fatty acids (P ⩽ 0.001), a lower percentage of saturated fatty acids (P ⩽ 0.05) and a lower n-6/n-3 index (P ⩽ 0.001) than did the INT-reared animals. Production system before the fattening period might modify some of the characteristics of commercial beef, especially those associated with fat. This research was financed by European Project Programmes POCTEFA-OTRAC I 2009/010. The authors thank the OTRAC consortium members and the local government (DGA) for the PhD scholarship. info:eu-repo/semantics/publishedVersion 2013-08-01 info:eu-repo/semantics/article Guerrero, A., C. Sañudo, P. Albertí, G. Ripoll, M.M. Campo, J.L. Olleta, B. Panea, S. Khliji, and P. Santolaria. 2013. "Effect Of Production System Before The Finishing Period On Carcass, Meat And Fat Qualities Of Beef". Animal 7 (12): 2063-2072. doi:10.1017/s1751731113001729. 1751-7311 http://hdl.handle.net/20.500.12327/2355 https://doi.org/10.1017/S1751731113001729 eng Animal EC/INTERREG-POCTEFA/EU/ / /OTRAC Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess 10 Elsevier