Effect of lipid sources on fatty acid profiles of meat from pasture- and feedlot-finished Nellore bulls

dc.contributor.authorFiorentini, G. [UNESP]
dc.contributor.authorSantana, M. O. [UNESP]
dc.contributor.authorMessana, J. D. [UNESP]
dc.contributor.authorValente, A. L.S. [UNESP]
dc.contributor.authorHärter, C. J. [UNESP]
dc.contributor.authorRabelo, C. H.S. [UNESP]
dc.contributor.authorBarbero, R. P. [UNESP]
dc.contributor.authorLanna, D. P.D.
dc.contributor.authorReis, R. A. [UNESP]
dc.contributor.authorBerchielli, T. T. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)
dc.date.accessioned2018-12-11T17:18:35Z
dc.date.available2018-12-11T17:18:35Z
dc.date.issued2018-05-01
dc.description.abstractWe aimed to compare the influence of two lipid sources (soybean grain [SG], and protected fat [PF, Lactoplus], based on soybean oil) with a control diet (no lipid supplementation) on the fatty acid (FA) profile (longissimus muscle and subcutaneous fat) of beef cattle finished on grazing pasture or at a feedlot. The study was arranged in a complete randomized design, using 2 × 3 factorial scheme that combined 2 finishing systems and 3 diets. Seventy-eight young Nellore bulls (323.8 ± 25.4 kg body weight [BW] and 21 ± 3 months of age) were divided at random into two finishing systems: 1) pasture-finishing and 2) feedlot-finishing. The diet containing PF increased CLA in the muscle (P = 0.0002). Pasture-finished bulls fed lipid-supplemented diets had significantly more (P = < 0.0001) subcutaneous saturated fatty acids and polyunsaturated fatty acids (PUFA) in muscle, whereas the PUFA concentration of PF-fed bulls was highest (P = < 0.0001) in subcutaneous fat. The highest (P = 0.0090) concentration of Omega-6 (n6) was observed in the muscle tissue of pasture-finished animals supplemented with SG. However, the lowest concentration (P = 0.0010) of n6 FAs in subcutaneous fat was more evident in pasture-finished animals receiving the control diet. The concentration of C20:5 n3 (EPA) was significantly higher (P = 0.040) in the muscle tissue of animals receiving the control diet in pasture and deposition of EPA was greater (P = 0.0020) in the subcutaneous fat of pasture-finished animals. The highest concentrations (P = < 0.0001) of n3 were observed in the muscle tissue of pasture-finished animals. Animals receiving the control diet in both finishing systems had a lower (P = 0.0051) n6:n3 ratio in muscle tissue. By comparison, feedlot-finished animals showed a higher (P < 0.01) n6:n3 ratio in muscle tissue, and the highest (P = 0.0190) n6:n3 ratio in subcutaneous fat was observed in pasture- and feedlot-finished animals supplemented with PF compared to the control diet. The muscle and subcutaneous fat tissues of feedlot-finished bulls fed the control and SG diets had a significantly higher (P < 0.05) Δ9-desaturase C16 index. The lowest (P = 0.0010) elongase concentrations were observed in the muscle tissue of PF-fed bulls, regardless of finishing system. Overall, bulls finished on grazing pasture had a more desirable FA composition.en
dc.description.affiliationDepartment of Animal Science UNESP Univ Estadual Paulista/Campus Jaboticabal, Rod. Professor Paulo Donato Castellane, km 5, Rural
dc.description.affiliationAnimal Science Department at Escola Superior de Agricultura “Luiz de Queiroz” (ESALQ/USP)
dc.description.affiliationINCT/CA – UFV – Department of Animal Science s/n Campus Universitário Av, . Peter Henry Rolfs
dc.description.affiliationUnespDepartment of Animal Science UNESP Univ Estadual Paulista/Campus Jaboticabal, Rod. Professor Paulo Donato Castellane, km 5, Rural
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: #2011/00060
dc.description.sponsorshipIdFAPESP: #2013/02418
dc.description.sponsorshipIdFAPESP: #2013/04758
dc.description.sponsorshipIdFAPESP: #2014/09033
dc.description.sponsorshipIdFAPESP: #2014/09814
dc.description.sponsorshipIdFAPESP: #2016/08585
dc.description.sponsorshipIdFAPESP: 1
dc.description.sponsorshipIdFAPESP: 2
dc.description.sponsorshipIdFAPESP: 3
dc.description.sponsorshipIdFAPESP: 5
dc.description.sponsorshipIdFAPESP: 6
dc.description.sponsorshipIdFAPESP: 8
dc.format.extent52-60
dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2018.03.006
dc.identifier.citationLivestock Science, v. 211, p. 52-60.
dc.identifier.doi10.1016/j.livsci.2018.03.006
dc.identifier.file2-s2.0-85044117277.pdf
dc.identifier.issn1871-1413
dc.identifier.scopus2-s2.0-85044117277
dc.identifier.urihttp://hdl.handle.net/11449/176021
dc.language.isoeng
dc.relation.ispartofLivestock Science
dc.relation.ispartofsjr0,730
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCLA
dc.subjectLipid sources
dc.subjectLongissimus muscle
dc.subjectProtected fat
dc.subjectSoybean grains
dc.subjectSubcutaneous fat
dc.titleEffect of lipid sources on fatty acid profiles of meat from pasture- and feedlot-finished Nellore bullsen
dc.typeArtigo
unesp.departmentZootecnia - FCAVpt

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