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Milan Margetin
Marta Oravcova
Jana Margetinova
Robert Kubinec
Martin Janicek


The objective of this study was to determine the content of fatty acids (FAs) in the intramuscular fat of heavy lambs of two breeds: Berrichon du Cher (BE) and Suffolk (SF) in a semi-intensive production system with different nutrition management schemes applied (SI1 and SI2) using gas chromatography. Nutrition differed mainly in a short period before the slaughter: BE/SI1 lambs were fed with hay and concentrates, SF/SI2 lambs grazed and suckled a milk. The samples were taken from the Musculus longissimus dorsi and the analysis of variance with factors of breed/production system (BE/SI1, SF/SI2) and lamb sex (males, females) was used to study the differences in FAs. The content of essential FAs, linoleic acid and α-linolenic acid summed, was higher in SF/SI2 lambs (6.26 g.100 g-1 FAME); this significantly (P < 0.001) differed from BE/SI1 lambs (4.64 g.100 g-1 FAME). The contents of health beneficial FAs (arachidonic, eicosapentaeonic, docosapentaeonic, docosahexaenoic acids) were also higher in SF/SI2 lambs (2.00, 0.59, 0.83, 0.27 g.100 g-1 FAME) and significantly (P < 0.001) differed from BE/SI1 lambs (1.15, 0.30, 0.44, 0.13 g.100 g-1 FAME). The content of conjugated linoleic acid (health beneficial FA as well) was 1.67 g.100 g-1 FAME in SF/SI2 lambs and 1.07 g.100 g-1 FAME in BE/SI1lambs (P < 0.001). The ratio of n-6/n-3 polyunsaturated FAs agreed, whilst the ratio of polyunsaturated/saturated FAs did not agree with the recommended values (found better in SF/SI2 lambs).

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