| Subcutaneous fatty acid composition of steers finished as weanlings or yearlings with and without growth promotants |
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| 作者姓名： | Cletos Mapiye Tyler D Turner John A Basarab Vern S Baron Jennifer L Aalhus Michael ER Dugan |
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| 作者单位： | [1] Agriculture and Agri-Food Canada, Lacombe Research Centre, 6000 C ＆amp; E Trail, Lacombe, Alberta T4L 1W1, Canada [2] Alberta Agriculture and Rural Development, Lacombe Research Centre, 6000 C ＆amp; E Trail, Lacombe, Alberta T4L 1W1, Canada |
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| 基金项目： | funding support from Alberta Livestock and Meat Agency Ltd.;the receipt of NSERC fellowships funded through Alberta Meat and Livestock Agency (ALMA) |
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| 摘 要： | Background: The current study evaluated the subcutaneous fatty acid(FA) composition of calf- and yearling-fed stee 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-18:1isomers(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.
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| 关 键 词： | 单不饱和脂肪酸 生长促进剂 脂肪酸组成 公牛 n-6多不饱和脂肪酸 生产系统 植入物 随机设计 |
Subcutaneous fatty acid composition of steers finished as weanlings or yearlings with and without growth promotants |
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| Cletos Mapiye,Tyler D Turner,John A Basarab,Vern S Baron,Jennifer L Aalhus,Michael ER Dugan.Subcutaneous fatty acid composition of steers finished as weanlings or yearlings with and without growth promotants[J].Journal of Animal Science and Biotechnology,2014(1):98-105. |
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| Authors: | Cletos Mapiye Tyler D Turner John A Basarab Vern S Baron Jennifer L Aalhus Michael ER Dugan |
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| Institution: | Agriculture |
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| Abstract: | Age at feedlot entry, Beef, Fatty acids, Growth implant, Steers |
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| Keywords: | Age at feedlot entry Beef Fatty acids Growth implant Steers |
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