Centro de Investigación y Tecnología Agroalimentaria (CITA), Gobierno de Aragón, Avda. Montañana 930, 50059 Zaragoza, Spain.
Meat Sci. 2013 Jun;94(2):208-14. doi: 10.1016/j.meatsci.2013.01.015. Epub 2013 Feb 15.
Forty-eight young Holstein bulls (slaughtered at 458.6±9.79 kg body weight) were used to evaluate the effect of whole linseed and conjugated linoleic acid (CLA) supplementation on animal performance, adipose tissue development, and carcass characteristics. The animals were fed with one of four isoenergetic and isoproteic diets: control (0% linseed, 0% CLA), linseed (10% linseed, 0% CLA), CLA (0% linseed, 2% CLA), and linseed plus CLA (10% linseed, 2% CLA). Animal performance and carcass characteristics were unaffected by diet composition. Adding linseed or CLA to the concentrate diet did not result in significant differences in adipocyte size and number or lipogenic enzyme activity. However, while the frequency distribution of subcutaneous adipocyte diameters followed a normal distribution, the frequency distribution of intramuscular adipocyte diameters was not normal in any dietary group (skewness coefficients: 0.8, 1.2, 0.9, 0.8 for control, linseed, CLA, and linseed plus CLA, respectively; P<0.05), indicative of adipocyte proliferation in the intramuscular adipose tissue.
四十八头荷斯坦公牛（宰前体重为 458.6±9.79kg）被用于评估全亚麻籽和共轭亚油酸（CLA）补充对动物生产性能、脂肪组织发育和胴体特征的影响。这些动物饲喂四种等能量和等蛋白的日粮之一：对照组（0%亚麻籽，0%CLA）、亚麻籽组（10%亚麻籽，0%CLA）、CLA 组（0%亚麻籽，2%CLA）和亚麻籽加 CLA 组（10%亚麻籽，2%CLA）。日粮组成对动物生产性能和胴体特征没有影响。在浓缩饲料中添加亚麻籽或 CLA 并没有导致脂肪细胞大小和数量或脂肪生成酶活性的显著差异。然而，虽然皮下脂肪细胞直径的频率分布遵循正态分布，但在任何日粮组中，肌内脂肪细胞直径的频率分布都不正常（偏度系数：对照组、亚麻籽组、CLA 组和亚麻籽加 CLA 组分别为 0.8、1.2、0.9 和 0.8；P<0.05），表明肌内脂肪组织中的脂肪细胞增殖。
