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Effect of weight at slaughter and breed on beef intramuscular lipid classes and fatty acid profile.
MedLine Citation:
PMID:  22445131     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
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, Avileña, 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.
Authors:
G Indurain; M J Beriain; M V Sarries; K Insausti
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Animal : an international journal of animal bioscience     Volume:  4     ISSN:  1751-732X     ISO Abbreviation:  Animal     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2012-03-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101303270     Medline TA:  Animal     Country:  England    
Other Details:
Languages:  eng     Pagination:  1771-80     Citation Subset:  IM    
Affiliation:
Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Pública de Navarra, Campus de Arrosadía 31006, Pamplona, Spain.
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