Effect of weight at slaughter and breed on beef intramuscular lipid classes and fatty acid profile

被引：12
作者：
Indurain, G. [1 ]
Beriain, M. J. [1 ]
Sarries, M. V. [1 ]
Insausti, K. [1 ]
机构：
[1] Univ Publ Navarra, Escuela Tecn Super Ingenieros Agronomos, Pamplona 31006, Spain
来源：
ANIMAL | 2010年 / 4卷 / 10期
关键词：
lipid classes; fatty acids; beef; breed; slaughter weight; CONJUGATED LINOLEIC-ACID; ADIPOSE-TISSUE; CHOLESTEROL CONTENT; MEAT QUALITY; DEPOSITION; FATNESS; TRAITS; MUSCLE;
D O I：
10.1017/S1751731110000923
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The effect of slaughter weight and breed on the composition of intramuscular fat (IMF) of seven Spanish cattle breeds was studied. Lipid classes and fatty acids were evaluated in young bulls of seven local Spanish cattle breeds, Asturiana, Avilena, Morucha, Parda Alpina, Pirenaica, Retinta and Rubia Gallega, slaughtered at a live weight of 320 kg (veal type) and 550 kg (yearling bull type). Higher slaughter weight and early maturating breeds produced higher IMF content in the longissimus muscle (P < 0.001), which was linked to a reduction in phospholipids, monoglycerides, diglycerides, cholesterol and free-fatty acids content, but an increase in triacylglycerols. Besides, heavier animals displayed a higher percentage of saturated and monounsaturated fatty acids (MUFA), but a lower polyunsaturated fatty acids (PUFA) percentage (P < 0.001). The increase in triglycerides (TG), saturated fatty acids (SFA) and MUFA illustrates the increasing importance of lipid storage as fattening proceeds and the acquisition of ruminal functionality. The feeding system based on cereals had a strong influence on the fatty acid profile, giving the studied beef a relatively high PUFA/SFA and n-6/n-3 ratios.
引用
收藏
页码：1771 / 1780
页数：10
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