ORIGINAL PAPER
The effect of breed and feeding level on carcass composition, fatty acid profile and expression of genes encoding enzymes involved in fat metabolism in two muscles of pigs fed a diet enriched in n-3 fatty acids. A preliminary study
M. Sobol 1  
,   A. Krawczyńska 1
,   G. Skiba 1,   S. Raj 1,   D. Weremko,   A. P. Herman 1
 
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The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland
CORRESPONDING AUTHOR
M. Sobol   

The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland
Publication date: 2015-03-15
 
J. Anim. Feed Sci. 2015;24(1):31–40
 
KEYWORDS
ABSTRACT
The experiment was performed according to a 2 x 2 factorial design with breed and level of nutrition as factors affecting fat metabolism in pigs. Two groups of gilts, each comprising 4 Polish Large White (PLW) and 4 Synthetic Line 990 (L990) animals, were fed from 60 to 105 kg body weight on the experimental diet at 85% or 95% of assumed ad libitum intake. The diet contained 2% of linseed, 0.5% rapeseed and 0.5% fish oils as the source of n-3 fatty acids (FA). The carcass protein content was smaller and backfat thickness greater in L990 than in PLW pigs. Also the intramuscular fat content in the biceps femoris (BF) and longissimus dorsi (LD) muscles and their contents of total FA, saturated fatty acids, monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA) were higher or tended to be higher in L990 than in PLW pigs, the differences between the breeds being more pronounced in the BF muscle. The n-6/n-3 PUFA ratio tended to be lower in the LD muscle, whereas in the BF muscle, it was lower in L990 than in PLW pigs. Feeding at the 85% level resulted in smaller backfat thickness and carcass fat content in animals of both breeds. Gene expression of stearoyl-CoA desaturase in both muscles was higher in L990 pigs, which could have resulted in the higher MUFA and PUFA contents in this breed. Gene expression of fatty acid-binding protein 4 and peroxisome proliferator-activated receptor were affected both by breed and feeding level only in the BF muscle.
 
CITATIONS (4):
1.
Effects of diets supplemented with n–3 or n–6 PUFA on pig muscle lipid metabolites measured by non-targeted LC–MS lipidomic profiling
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Journal of Food Composition and Analysis
 
2.
Relationship between pork fatty acid content in selected muscles and carcass tissues
Monika Sobol, Stanisława Raj, Grzegorz Skiba
Animal Production Science
 
3.
Different dietary starch sources alter the carcass traits, meat quality, and the profile of muscle amino acid and fatty acid in finishing pigs
Miao Yu, Zhenming Li, Ting Rong, Gang Wang, Zhichang Liu, Weidong Chen, Jiazhou Li, Jianhao Li, Xianyong Ma
Journal of Animal Science and Biotechnology
 
4.
ssc-miR-451 Regulates Porcine Primary Adipocyte Differentiation by Targeting ACACA
Mailin Gan, Linyuan Shen, Yuan Fan, Ya Tan, Lin Liu, Lei Chen, Ye Zhao, Lili Niu, Guoqing Tang, Qiang Li, Xu Xu, Tinghuan Zhang, Xuewei Li, Shunhua Zhang, Li Zhu
Animals
 
ISSN:1230-1388