摘要
Residual feed intake (RFI) is a measure of feed efficiency that is not related to an animal's growth rate or body size. Little is known about the factors that affect RFI because, until recently, the measurement of RFI in large numbers of animals was not possible. Recently, researchers have shown a relationship in poultry between feed efficiency and measures of mitochondrial function and respiration. We hypothesized that a similar relationship existed in cattle. Steers were selected to have high or low RFI, the animals were scarified, and mitochondria were isolated from skeletal muscle. Low RFI steers had greater rates of state 2 and 3 respiration and produced more hydrogen peroxide. A blood assay was designed based on these findings to predict RFI status. The assay was able to detect differences between the high and low RFI groups; however it was not sensitive enough to correctly predict RFI status of individual animals.
摘要译文
残余饵料摄入（RFI）是衡量饲料效率是不相关的动物的生长速度，或身体的尺寸。鲜为人知的是，影响RFI因为，直到最近， RFI的大量动物的测量是不可能的因素。最近，研究人员已经证明在饲料效率和线粒体功能和呼吸的措施家禽之间的关系。我们假设，一个类似的关系存在于牛。阉牛被选择为具有高或低的RFI ，动物们翻松，和线粒体是从骨骼肌分离。低RFI有肉牛状态2和3呼吸更大率和产生更多的过氧化氢。血液检测是基于这些研究结果预测RFI状态设计的。该试验能够检测高和低的RFI组之间的差异;但它不是足够敏感的正确预测动物个体RFI状态。
Kolath, William H.. The relationship between mitochondria and residual feed intake in feedlot cattle[D]. US: University of Missouri - Columbia, 2006