Genotype and dietary inclusion of omega-3 fatty acids and fiber influence metabolism of subcutaneous adipose tissue and systemic metabolic outcomes in growing pigs
IF 7.1 1区 农林科学Q1 Agricultural and Biological Sciences
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引用次数: 0
Abstract
Adipose tissue properties are considered as determinants of meat quality, but also play roles in animal robustness. From 33 kg to 116 kg on average, a total of 60 Duroc (D) or Pietrain (P) crossbred female pigs were individually fed either a conventional (C) or an experimental (R) feeding strategy with a diet rich in omega 3 fatty acids and crude fibers (n = 15 pigs per group). The D pigs had a lower feed efficiency and a higher proportion of subcutaneous adipose tissue (SCAT) at slaughter than P pigs (P < 0.01). SCAT in D pigs had lower levels of polyunsaturated fatty acids (PUFA; P < 0.001) and higher levels of peroxidized lipids (P < 0.05) than SCAT in P pigs. In plasma, reactive oxygen metabolites to total antioxidant capacity was higher (P < 0.01) in D pigs than in P pigs. Compared to C, feeding the R diet resulted in a marked decrease in the n-6:n-3 PUFA ratio in SCAT, which was even more pronounced in D pigs than in P pigs (P < 0.05). The R feeding strategy increased beta-hydroxyacyl-coenzyme A dehydrogenase activity (P < 0.05) acting in fatty acid oxidation, and SCAT susceptibility to peroxidation. This also led to a reduction in plasma phospholipid concentrations and oxidative stress in the D pigs (P < 0.05). Thus, the nutritional value of fat products for humans and the systemic metabolic outcomes for pigs could be improved with an appropriate feeding strategy.
期刊介绍:
The aim of Meat Science is to serve as a suitable platform for the dissemination of interdisciplinary and international knowledge on all factors influencing the properties of meat. While the journal primarily focuses on the flesh of mammals, contributions related to poultry will be considered if they enhance the overall understanding of the relationship between muscle nature and meat quality post mortem. Additionally, papers on large birds (e.g., emus, ostriches) as well as wild-captured mammals and crocodiles will be welcomed.