Institute of Animal Science, Chinese Academy of Agricultural Sciences, State Key Laboratory of Animal Nutrition, Beijing, China.
J Anim Physiol Anim Nutr (Berl). 2010 Aug 1;94(4):474-85. doi: 10.1111/j.1439-0396.2009.00932.x. Epub 2009 Aug 3.
The effects of varying the omega6 to omega3 fatty acid ratio (omega6/omega3) of diets on growth performance, carcass traits, meat quality and fatty acid composition of breast muscle were investigated in Beijing-you chickens grown to 92 days. A total of 360 one-day-old female BJY chickens were fed diets containing 0%, 0.12%, 0.42%, 1.00% or 1.97% linseed oil replacing equal weights of maize oil to make dietary omega6/omega3 to be approximately 30:1, 20:1, 10:1, 5:1 and 2.5:1. Subcutaneous fat thickness and intramuscular fat content increased significantly in birds fed up to 10:1 omega6/omega3. a* values (redness of meat, dimension of the CIELAB-system) progressively increased as the diets contained increasing omega3 content, up to the 10:1 omega6/omega3.The changes in b* (yellowness of meat, dimensions of the CIELAB-system) were also significant but the pattern was almost the reverse of changes in a*. Shear force increased significantly as dietary omega6/omega3 was reduced from 30:1 to 5:1. Decreasing the dietary omega6/omega3 clearly decreased the content in breast muscle of C20:1 and C22:1, but increased that of C24:1. C20:4, C20:5 and C22:5, increased significantly by decreasing the dietary omega6/omega3, and the birds fed the 10:1 diet had higher contents of C22:6 than other treatments. This study has clearly demonstrated that decreasing the dietary omega6/omega3, increases the deposition of desirable omega3 and omega6 long chain PUFA in the edible tissue, thereby achieving nutritionally enriched meat.
研究了饲粮ω-6 与 ω-3 脂肪酸比值（ω-6/ω-3）变化对 92 日龄北京油鸡生长性能、胴体特性、肉质和胸肌脂肪酸组成的影响。将 360 只 1 日龄雌性 BJY 鸡分别饲喂含 0%、0.12%、0.42%、1.00%或 1.97%亚麻籽油的日粮，以等量玉米油替代，使饲粮 ω-6/ω-3 约为 30:1、20:1、10:1、5:1 和 2.5:1。饲粮 ω-6/ω-3 为 10:1 时，鸡的皮下脂肪厚度和肌内脂肪含量显著增加。随着饲粮 ω-3 含量的增加，a值（肉的红色度，CIELAB 系统的维度）逐渐增加，在饲粮 ω-6/ω-3 为 10:1 时达到最高。b值（肉的黄色度，CIELAB 系统的维度）的变化也很显著，但模式几乎与 a*值相反。随着饲粮 ω-6/ω-3 从 30:1 减少到 5:1，剪切力显著增加。降低饲粮 ω-6/ω-3 明显降低了胸肌中 C20:1 和 C22:1 的含量，但增加了 C24:1 的含量。随着饲粮 ω-6/ω-3 的降低，C20:4、C20:5 和 C22:5 的含量显著增加，饲喂 10:1 日粮的鸡的 C22:6 含量高于其他处理。本研究清楚地表明，降低饲粮 ω-6/ω-3 可增加可食组织中理想的 ω-3 和 ω-6 长链多不饱和脂肪酸的沉积，从而实现营养丰富的肉。
