Influence of feeding system (concentrate and total mixed ration) on fatty acid profiles of beef from three lean cattle breeds

被引：17
作者：
Horcada, A. [1 ]
Polvillo, O. [2 ]
Juarez, M. [3 ]
Aviles, C. [4 ]
Martinez, A. L. [4 ]
Pena, F. [4 ]
机构：
[1] Univ Seville, Escuela Tecn Super Ingn Agron, Dept Ciencias Agroforestales, Seville 41013, Spain
[2] Univ Seville, Serv Gen Invest Agr CITIUS, Seville 41013, Spain
[3] Agr & Agri Food Canada, Lacombe Res Ctr, 6000C & E Trail, Lacombe, AB T4L 1W1, Canada
[4] Univ Cordoba, Dept Anim Prod, E-14071 Cordoba, Spain
来源：
JOURNAL OF FOOD COMPOSITION AND ANALYSIS | 2016年 / 49卷
关键词：
Food analysis; Food composition; Gas chromatography; Beef; Fatty acids; Unimproved breed; Landrace; Indigenous cattle breeds; Selected breed; Grain-fed; Unifeed system; CONJUGATED LINOLEIC-ACID; MEAT QUALITY; YOUNG BULLS; DAIRY-COWS; CARCASS CHARACTERISTICS; GROWTH-PERFORMANCE; INTRAMUSCULAR FAT; GRASS-SILAGE; MUSCLE; LIMOUSIN;
D O I：
10.1016/j.jfca.2016.04.008
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The objective of this study was to examine the effect of two feeding systems (traditional concentrate plus cereal straw vs. total mixed ration) on the fatty acid composition of beef in lean beef breeds slaughtered at commercial weight. Two improved breeds, purebred Charolais (n = 60) and Limousine (n = 60), and one unimproved indigenous breed, Retinta (n = 60), were raised on either an indoor concentrate system or a unifeed system consisting of a mixture of maize silage and concentrate. Young bulls fed the total mixed ration system showed a higher percentage of saturated fatty acid content than young bulls fed with concentrate plus wheat straw. The intramuscular fat of Retinta bulls raised on a concentrate feeding system showed higher monounsaturated (587.3 mg/100 g edible meat) and lower polyunsaturated fatty acid (221.0 mg/100 g edible meat) than Retinta bulls that were fed with mixed ration. No feeding system effect on fatty acid profile of fat was observed for the improved breeds. At commercial weight, the percentage of fatty acid desirable for human health was higher (70.3%) from the unimproved breed than the improved breeds (69.1%). The results obtained confirm that genetic background plays an important role in the fatty acid profile of meat from cattle raised with different feeding systems. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码：110 / 116
页数：7
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