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Food, fibre and pharmaceuticals from animals
REVIEW

Meat quality traits and feeding distillers grains to cattle: a review

M. Merayo A B , D. Pighin A B C D and G. Grigioni A B C
+ Author Affiliations
- Author Affiliations

A Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina.

B Instituto Tecnología de Alimentos, Centro de Investigación de Agroindustria, INTA, Nicolás Repetto y de los Reseros s/n, CC 27, CP 1712, Castelar, Buenos Aires, Argentina.

C Universidad de Morón, Cabildo 134, B1708JPD, Morón, Buenos Aires, Argentina.

D Corresponding author. Email: pighin.dario@inta.gob.ar

Animal Production Science 60(9) 1123-1135 https://doi.org/10.1071/AN18382
Submitted: 13 June 2018  Accepted: 4 December 2019   Published: 12 March 2020

Abstract

Livestock management and meat production involve a series of steps that affect meat quality. Animal genetics, nutrition and diets, slaughter procedures and meat-preservation conditions are some of the parameters that should be controlled to maintain meat quality. In regard to animal nutrition and diets, novel ingredients are increasingly used, distillers grains (DG) being an example. DG are obtained as a co-product from bioethanol production and comprise the fat, protein, fibre and micronutrient portion of the grains. Many papers have studied the inclusion of DG in finishing diets and their effect on growth performance and meat characteristics, but a review on the effects on meat quality is needed. Feeding with DG influences beef colour; nevertheless, a relationship between the level of inclusion and colour development has not been established yet. In addition, feeding DG-inclusion diets sometimes increases meat discoloration during retail display. Also, the composition of fatty acids is modified since total polyunsaturated fatty acid content in meat increases with the inclusion of DG in finishing diets. This increment in polyunsaturated fatty acid content is likely to contribute to lipid oxidation processes and might be related to meat discoloration due to myoglobin oxidation. However, meat tenderness has not been modified in most of the cases. This review focused on recent studies on DG inclusion, animal performance and meat quality. Key points that need further research are also identified and discussed.

Additional keywords: beef, colour, fatty acid profile, finishing diets, tenderness.


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