Intramuscular Fatty Acid Composition of the Longissimus Muscle of Unweaned Minhota Breed Calves at Different Slaughter Age
محورهای موضوعی : Camelجی.پی. آرایجو 1 , پی. پیرس 2 , جی.ل. سرکواِیرا 3 , م. باروس 4 , ت. مورنو 5
1 - Centro de Investigação de Montanha, Instituto Politécnico de Viana do Castelo, Portugal|Escola Superior Agrária do Instituto Politécnico de Viana do Castelo, Refóios do Lima, 4990‐706 Ponte de Lima, Portugal
2 - Escola Superior de Tecnologia e Gestão do Instituto Politécnico de Viana do Castelo, Avenida do Atlântico, 4900‐348 Viana do Castelo, Portugal|CISAS, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun´Álvares, 4900-347, Viana do Castelo, Portugal
3 - Escola Superior Agrária do Instituto Politécnico de Viana do Castelo, Refóios do Lima, 4990‐706 Ponte de Lima, Portugal|Centro de Ciência Animal e Veterinária (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
4 - Escola Superior de Tecnologia e Gestão do Instituto Politécnico de Viana do Castelo, Avenida do Atlântico, 4900‐348
Viana do Castelo, Portugal
5 - Departamento de Producción Animal, Centro de Investigaciones Agrarias de Mabegondo, Apdo 10, 15080 A Coruña, Spain
کلید واژه: meat quality, Fatty Acids, beef, healthy nutrition, veal,
چکیده مقاله :
Meat productions from sixteen local Portuguese cattle breeds represent high economic and cultural value for local populations. Among these, Minhota is one of the most important on meat aptitude located on the northwest of the country. This breed is used for high-quality meat. This study describes the influence of slaughter age, corresponding veal (6 months) and beef (9 months) and sex, reared in a traditional production system, on intramuscular fatty acid composition of the longissimus muscle and nutritional quality. Samples of the longissimusthoracis (LT) muscle were analysed for fatty acid composition of intramuscular fat from 41 Minhota breed animals. Unweaned veal (22) and beef (19), corresponding to males (n=25) and females (n=16) were analysed. Both groups of animals were reared in a traditional production system. The meat from the Minhota breed is a valuable source of polyunsaturated fatty acid (PUFA), particularly the C-20 and C-22 n-3 fatty acids in the human diet. A low n-6:n-3 ratio show that fat in this breed has a good nutritional value. The differences in fat composition from veal and beef could be attributed to the fact that maternal suckling is more important in the youngest animals.
محصولات گوشتی از 16 نژاد گاو پرتقالی ارزش اقتصادی و فرهنگی بالایی برای جمعیت‌های بومی نشان می‌دهد. در این میان، Minhota یکی از مهمترین‌ها در توانایی تولید گوشت واقع در شمال غربی کشور است. این نژاد برای کیفیت گوشت بالا استفاده می‌شود. این مطالعه تاثیر سن کشتار، گوشت گوساله (6 ماهه) و گاو (9 ماهه) و جنس، پرورش یافته در سیستم تولید سنتی، روی ترکیب اسید چرب داخل عضلانی ماهیچه longissimus و کیفیت تغذیه را شرح می‌دهد. نمونه‌هایی از ماهیچهlongissimus thoracis برای ترکیب اسید چرب چربی درون ماهیچه‌ای از 41 گاو نژاد Minhota آنالیز شدند. گوساله شیرگیری نشده (22) و گاو (19)، مربوط به نرها (n=25) و ماده‌ها (n=16) آنالیز شدند. هر دو گروه از حیوانات در یک سیستم تولیدی سنتی پرورش یافته‌اند. گوشت نژاد Minhota یک منبع ارزشمند از اسیدهای چرب غیر اشباع، خصوصاً اسیدهای چرب C-20 و C-22 n-3 در جیره انسانی است. یک نسبت n-6:n-3 پایین نشان می‌دهد که چربی در این نژاد ارزش تغذیه‌ای خوبی دارد. تفاوت‌ها در ترکیب چربی از گوساله و گاو می‌تواند به این واقعیت که مکیدن مادری (maternal suckling) در حیوانات جوان‌تر مهم‌تر است نسبت داده شود.
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