Yang K X, Ma J W, Guo Y M, Guo T F, Zhao Y G, Ding N S, Betti M, Plastow G S, Huang L S
Key Laboratory for Animal Biotechnology of Jiangxi Province and the Ministry of Agriculture of China, Jiangxi Agricultural University, Nanchang, Peoples Republic of China.
J Anim Sci. 2010 Nov;88(11):3538-45. doi: 10.2527/jas.2009-2602. Epub 2010 Jul 9.
The aim of this study was to quantify the partial correlation coefficients (r(p)) between fat depot traits (FDT) and the fatty acid composition of abdominal subcutaneous adipose tissue and LM intramuscular fat in 639 F(2) pigs derived from a White Duroc × Chinese Erhualian cross. Fat depot traits are classified into 2 groups: 1 is adipose tissues (abdominal subcutaneous adipose tissue weight, mesenteric adipose tissue weight, perirenal adipose tissue weight, and backfat thickness at 4 locations); the other is LM [intramuscular fat content (IMF) and marbling score]. Correlations of FDT within classification groups were markedly greater (P < 0.001) than those observed between the 2 groups (r(p) = 0.62 vs. 0.26), indicating variability in fat content of muscle is relatively independent of amount of carcass fat. In general, fatter pigs had greater (P < 0.05) proportions of SFA and MUFA, and less PUFA, than leaner pigs. However, the relationships of individual fatty acids with FDT varied. We found that the amounts of some fatty acids regarded as neutral (e.g., stearic acid) or beneficial (e.g., palmitoleic acid and linolenic acid) for human health were associated with smaller amount of adipose tissues, or merely with greater IMF (P < 0.05). Therefore, we conclude that increasing the proportions of these neutral or healthy fatty acids can be achieved without reducing the IMF of LM, which is positively related to eating quality.
本研究旨在量化639头源自白色杜洛克×中国二花脸杂交的F2代猪的脂肪沉积性状（FDT）与腹部皮下脂肪组织和腰大肌肌内脂肪的脂肪酸组成之间的偏相关系数（r(p)）。脂肪沉积性状分为两组：一组是脂肪组织（腹部皮下脂肪组织重量、肠系膜脂肪组织重量、肾周脂肪组织重量以及4个部位的背膘厚度）；另一组是腰大肌[肌内脂肪含量（IMF）和大理石纹评分]。分类组内FDT的相关性显著高于两组之间的相关性（P < 0.001）（r(p) = 0.62对0.26），这表明肌肉脂肪含量的变异性相对独立于胴体脂肪量。一般来说，较肥的猪比较瘦的猪具有更高（P < 0.05）的饱和脂肪酸（SFA）和单不饱和脂肪酸（MUFA）比例，以及更低的多不饱和脂肪酸（PUFA）比例。然而，个别脂肪酸与FDT的关系有所不同。我们发现，一些对人体健康被视为中性（如硬脂酸）或有益（如棕榈油酸和亚麻酸）的脂肪酸含量与较少的脂肪组织量相关，或者仅与较高的IMF相关（P < 0.
