Composition en acides aminés des protéines musculaires du porc selon le type génétique

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Abstract
Amino acid composition of muscle crude protein was determined in 18 female pigs of 3 breeds (French Landrace, Belgian Landrace and Pietrain), distributed into 3 groups according to slaughter weight (40, 60 or 80 kg live weight). Mean levels of amino acids (expressed in g/16 g total N at 80 kg live weight) were tabulated. Magnitude of the variations according to slaughter weight was low. An increase in some essential amino acids (Lys, Thr, Phe and Met) was observed, mainly between 40-60 kg live weight. No difference according to genotype was found in the amino acid composition of the muscle. In terms of daily amino acid deposition, differences depended on differences between breeds in the deposition of protein. At similar growth rates and in liberal feeding conditions, the lysine deposition of Belgian Landrace pigs compared to French Landrace is 10 percent higher between 40-80 kg live weight.

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