Effect of a linseed diet or a sunflower diet on performances, fatty acid composition, lipogenic enzyme activities and stearoyl-CoA-desaturase activity in the pig |
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| Authors: | Mathieu Guillevic Maryline Kouba Jacques Mourot |
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| Institution: | aINRA, UMR 1079 Systèmes d'Elevage Nutrition Animale et Humaine, F-35000 Rennes, France;bValorex, F- 35210 Combourtillé, France |
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| Abstract: | The aim of this study was to compare the influence of a high α-linolenic acid (ALA) diet (linseed diet) and a high linoleic acid (LA) diet (sunflower diet) on performances of pigs, on the dietetical quality of their tissues (adipose tissues and muscles), and on the lipogenic potential of these tissues. Growth and carcass performances, and the lipid content of the tissues were not affected by the diet. Feeding the linseed diet increased the content of n-3 PUFA and decreased the LA/ALA ratios in all the tissues, while the sunflower diet led to an increase in the n-6 PUFA contents. Neither the stearoyl-CoA-desaturase and glucose-6-phosphate-dehydrogenase activities nor the β-hydroxyacyl-CoA-dehydrogenase activity were affected by the diet. Acetyl-CoA-carboxylase and fatty acid synthase activities were enhanced with the linseed diet in respectively subcutaneous adipose tissue and intermuscular adipose tissue, while malic enzyme activity was decreased in liver and subcutaneous adipose tissue of pigs fed the linseed diet. |
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| Keywords: | Linseed Pig Lipogenic enzymes Stearoyl-CoA-desaturase Sunflower |
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