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Fatty acid profile and qualitative characteristics of meat from zebu steers fed with different oilseeds1

The objective of this study was to evaluate the effects of dietary addition of ground oilseed sources on the quality, fatty acid profile, and CLA content of meat from zebu steers. Thirty-one zebu steers with an initial average age of 23 mo and an initial BW of 365 kg were used in this study. The exp...

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Published in:Journal of animal science 2011-08, Vol.89 (8), p.2546-2555
Main Authors: Oliveira, D. M., Ladeira, M. M., Chizzotti, M. L., Machado Neto, O. R., Ramos, E. M., Gonçalves, T. M., Bassi, M. S., Lanna, D. P. D., Ribeiro, J. S.
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cited_by cdi_FETCH-LOGICAL-c1091-16642600afffddd135f16744c98046b055db66cf0e04b8606d50cd6af69d2a483
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creator Oliveira, D. M.
Ladeira, M. M.
Chizzotti, M. L.
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Bassi, M. S.
Lanna, D. P. D.
Ribeiro, J. S.
description The objective of this study was to evaluate the effects of dietary addition of ground oilseed sources on the quality, fatty acid profile, and CLA content of meat from zebu steers. Thirty-one zebu steers with an initial average age of 23 mo and an initial BW of 365 kg were used in this study. The experimental period was 84 d, which was preceded by an adaption period of 28 d. The diet was provided ad libitum with a forage:concentrate ratio of 40:60. Corn silage was used as the forage source. Four different concentrates were formulated for each treatment: without additional lipids (control) or with ground soybeans (SB), ground cottonseed (CS), or ground linseed (LS). The SB, CS, and LS diets were formulated to have 6.5% ether extract on a total dietary DM basis. The experiment was set up as a completely randomized design. After slaughter, samples were taken from the longissirnus thoracis urnscle for the measurement of fatty acid concentration and the evaluation of meat quality. The luminosity index was greater in the control and LS diets (P < 0.01). The greatest percentages of myristic acid (C14:0), palmitic acid (C16:0), trans octadecenoic acid (C18:1 trans-10, trans-11, or trans-12), and SFA in the subcutaneous fat were observed in the CS treatment (P < 0.01). Moreover, the least percentages of oleic acid (C18:1 cis-9) and total unsaturated fatty acids in the subcutaneous fat were observed in the CS diet (P < 0.01). The meat linoleic acid and α-linolenic acid percentages were greatest in the SB and LS treatments, respectively (P < 0.001). The unsaturated fatty acid:SFA ratio was smallest for the CS diet (P < 0.01). A gradual increase in oxidation was observed as a function of storage time; however, the diets did not affect the rancidity of the meat (P > 0.05). The fatty acid profile of subcutaneous fat was impaired by the addition of CS. Supplying ground oilseeds did not increase the content of CLA in the meat. [PUBLICATION ABSTRACT]
doi_str_mv 10.2527/jas.2010-3553
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M. ; Ladeira, M. M. ; Chizzotti, M. L. ; Machado Neto, O. R. ; Ramos, E. M. ; Gonçalves, T. M. ; Bassi, M. S. ; Lanna, D. P. D. ; Ribeiro, J. S.</creator><creatorcontrib>Oliveira, D. M. ; Ladeira, M. M. ; Chizzotti, M. L. ; Machado Neto, O. R. ; Ramos, E. M. ; Gonçalves, T. M. ; Bassi, M. S. ; Lanna, D. P. D. ; Ribeiro, J. S.</creatorcontrib><description>The objective of this study was to evaluate the effects of dietary addition of ground oilseed sources on the quality, fatty acid profile, and CLA content of meat from zebu steers. Thirty-one zebu steers with an initial average age of 23 mo and an initial BW of 365 kg were used in this study. The experimental period was 84 d, which was preceded by an adaption period of 28 d. The diet was provided ad libitum with a forage:concentrate ratio of 40:60. Corn silage was used as the forage source. Four different concentrates were formulated for each treatment: without additional lipids (control) or with ground soybeans (SB), ground cottonseed (CS), or ground linseed (LS). The SB, CS, and LS diets were formulated to have 6.5% ether extract on a total dietary DM basis. The experiment was set up as a completely randomized design. After slaughter, samples were taken from the longissirnus thoracis urnscle for the measurement of fatty acid concentration and the evaluation of meat quality. The luminosity index was greater in the control and LS diets (P &lt; 0.01). The greatest percentages of myristic acid (C14:0), palmitic acid (C16:0), trans octadecenoic acid (C18:1 trans-10, trans-11, or trans-12), and SFA in the subcutaneous fat were observed in the CS treatment (P &lt; 0.01). Moreover, the least percentages of oleic acid (C18:1 cis-9) and total unsaturated fatty acids in the subcutaneous fat were observed in the CS diet (P &lt; 0.01). The meat linoleic acid and α-linolenic acid percentages were greatest in the SB and LS treatments, respectively (P &lt; 0.001). The unsaturated fatty acid:SFA ratio was smallest for the CS diet (P &lt; 0.01). A gradual increase in oxidation was observed as a function of storage time; however, the diets did not affect the rancidity of the meat (P &gt; 0.05). The fatty acid profile of subcutaneous fat was impaired by the addition of CS. Supplying ground oilseeds did not increase the content of CLA in the meat. 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subjects Cattle
Cotton
Fatty acids
Lipids
Studies
title Fatty acid profile and qualitative characteristics of meat from zebu steers fed with different oilseeds1
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