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The effects of dietary α-linolenic acid on growth performance, meat quality, fatty acid composition and liver relative enzyme mRNA expression of growing meat rabbits

H. T. Du 1,  
C. Y. Wang 1,  
X. P. Wang 1,  
M. W. Ma 1,  
F. C. Li 1  
Shandong Agricultural University, College of Animal Science and Technology, Tai’an, Shandong, 271018, P.R. China
J. Anim. Feed Sci. 2013;22(2):122–129
Publication date: 2013-06-13
The effects of five levels of added α-linolenic acid (ALA) (0, 1, 2, 3, and 4 g · kg–1 diet, as-fed basis) in diets on growth performance, meat quality, fatty acid composition of muscle and liver, and expression of acetyl-CoA carboxylase (ACC) and carnitine palmitoyl transferase 1 (CPT1) mRNA in the liver of growing meat rabbits were studied. A quadratic effect of ALA addition on average daily intake was found (P < 0.0001). ALA addition had a significant influence on muscle colour of longissimus lumborum (LL), including L*, a*, and b* (P < 0.0001, P = 0.0007, and P = 0.0120, respectively). The monounsaturated fatty acid (MUFA) content of LL decreased as dietary ALA increased (P = 0.0001) and the polyunsaturated fatty acid (PUFA) and C18:3 (n-3) contents in the LL and liver increased with dietary ALA increase (P = 0.0006, P < 0.0001, P < 0.0001, and P < 0.0001, respectively). The expression of ACC mRNA in the liver decreased (P < 0.0001), that of CPT 1, increased (P < 0.0001) as dietary ALA increased.
F. C. Li   
Shandong Agricultural University, College of Animal Science and Technology, Tai’an, Shandong, 271018, P.R. China
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