Agrocampus Ouest, INRA, 35590 Saint-Gilles, France.
Valorex, La Messayais, 35210 Combourtillé, France.
Meat Sci. 2018 Jun;140:1-8. doi: 10.1016/j.meatsci.2017.11.023. Epub 2017 Nov 21.
During two months, sixty Pietrain×(Landrace×Large White) finishing pigs (50.7 to 115.2kg live weight) received diets containing various levels of C18:3n-3 from linseed and C22:6n-3 from Schizochytrium microalgae to increase the content of these fatty acids (FA) in their lean and fat tissues. Samples of tissues have been extracted from the carcass at the slaughterhouse. Tissues of pigs fed linseed had the highest C18:3n-3 and C20:3n-3 contents, while the C20:4, C20:5 and C22:6n-3 contents increased in tissues with microalgae diets. Diaphragm was fatter, but contained less monounsaturated FA, total n-6 and n-3 polyunsaturated FA (PUFA) than longissimus thoracis et lumborum and semimembranosus muscles due to their different roles. The leaf fat was the most saturated and monounsaturated tissue, regardless of the diet. Adipose tissues located in extremities contained more n-3 and n-6 PUFA than adipose tissues located in the middle of the carcass. This study showed the existence of a PUFA gradient depending on tissue location.
在两个月的时间里，60 头皮特兰×（长白猪×大白猪）育肥猪（活重 50.7 至 115.2 公斤）接受了含有不同水平的 C18:3n-3 亚麻籽油和 C22:6n-3 裂殖壶菌的饮食，以增加瘦肉和脂肪组织中这些脂肪酸（FA）的含量。在屠宰场从胴体中提取了组织样本。饲用亚麻籽油的猪的组织中 C18:3n-3 和 C20:3n-3 含量最高，而微藻日粮中 C20:4、C20:5 和 C22:6n-3 含量增加。与背最长肌和半腱肌相比，膈肌更胖，但由于其不同的作用，含有较少的单不饱和 FA、总 n-6 和 n-3 多不饱和 FA（PUFA）。叶状脂肪是最饱和和单不饱和的组织，与饮食无关。位于四肢的脂肪组织比位于胴体中间的脂肪组织含有更多的 n-3 和 n-6 PUFA。本研究表明，根据组织位置存在 PUFA 梯度。
