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Permanent link (DOI): https://doi.org/10.7939/R3930NZ7G

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Subcutaneous fatty acid composition of steers finished as weanlings or yearlings with and without growth promotants Open Access

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Author or creator
Mapiye, C.
Turner, T. D.
Basarab, J. A.
Baron, V. S.
Aalhus, J. L.
Dugan, M. E. R.
Additional contributors
Subject/Keyword
beef
growth implant
fatty acids
age at feedlot entry
steers
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Background The current study evaluated the subcutaneous fatty acid (FA) composition of calf- and yearling-fed steers with or without growth promoting implants. Crossbred steers (n = 112; 267 ± 5.0 kg) of the same contemporary group were allocated to one of four production system and implant strategy based treatments in a completely randomized design with a 2 × 2 factorial arrangement of treatments. Results There were no interactions (P > 0.05) between production systems and growth promoting implants for the total and individual subcutaneous FA. Yearling as opposed to calf finishing reduced (P < 0.05) subcutaneous proportions of C20:3n-6, trans (t)12-18:1, C14:0, several minor cis-monounsaturated FA (c-MUFA; c9-14:1, c11-16:1, c11-18:1, c12-18:1, c13-18:1, c9-20:1 and c11-20:1), and increased (P < 0 .05) subcutaneous proportions of t11c15-18:2, total and individual branched-chain FA. Subcutaneous fat from steers implanted with growth promotants had higher (P < 0.05) proportions of total polyunsaturated FA (PUFA), total n-6 PUFA, C18:2n-6 and individual t-18:1 isomers (t6 to t10) compared to non-implanted steers. Conclusions Overall, current findings show that production systems and growth promotants led to only minor differences in subcutaneous FA composition of beef steers.
Date created
2013
DOI
doi:10.7939/R3930NZ7G
License information
Attribution 4.0 International
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Citation for previous publication
Mapiye, C., T.D. Turner, Basarab, J.A., V.S. Baron, J.L. Aalhus and M.E.R., Dugan. (2013). Subcutaneous fatty acid composition of steers finished as weanlings or yearlings with and without growth promotants. J. Anim. Sci and Biotech. 4(41) doi:10.1186/2049-1891-4-41  http://www.jasbsci.com/content/4/1/41

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