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Performance, carcass traits, meat quality and intramuscular lipogenesis in bulls and steers

Abstract

The purpose of this trial is evaluate effects of sexual condition (intact or castrated males) on dry matter intake, performance, carcass traits, meat quality, gene expression, mineral and proteomic profile in longissimus muscle of F1 Angus-Nellore cattle finished in feedlot. Six hundred and forty animals will be fed during 180 days. Longissimus thoracis samples will be collected between the 12th and 13th ribs to perform physico-chemical analyses. After slaughter, longissimus muscle will be sampled to proceed gene expression. Steaks with 2.54 cm will be collected to determine shear force, cooking loss, marbling score, colour, chemical composition, mineral profile and fatty acid profile. The expression of lipogenic genes and proteomic profile of muscule will be studied. In addition, the relationships between the variables of dry matter intake, performance, carcass and meat quality, fatty acid profile, mineral profile, gene expression and proteome will be studied by multivariate statistical approach, including principal component analysis, clustering and discriminant analysis. The hypothesis of this study is that non-castrated males F1 Angus-Nellore finished in feedlot (> 160 days) and slaughtered early (less than 24 months old) can produce meat with coloration, tenderness and intramuscular fat content similar to castrated F1 Angus-Nellore cattle when subjected to the same nutritional management. (AU)

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VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SANTIAGO, BISMARCK MOREIRA; BALDASSINI, WELDER ANGELO; TOMAZ, LAIS DE AQUINO; ROCHA, LEONE CAMPOS; DOS SANTOS, WELLINGTON BIZARRIA; CURI, ROGERIO ABDALLAH; LOYOLA CHARDULO, LUIS ARTUR; MACHADO NETO, OTAVIO RODRIGUES. Comparison of Dental Carcass Maturity in Non-Castrated Male F1 Angus-Nellore Cattle Finished in Feedlot. FOOD SCIENCE OF ANIMAL RESOURCES, v. 41, n. 3, p. 554-562, 2021. Web of Science Citations: 0.

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