Different oilseed supplements alter fatty acid composition of different adipose tissues of adult ewes.
Twenty-five mature Small Tail Han ewes were used to investigate the effects of supplemental oilseeds in the diet (sunflower seed, safflower seed, rapeseed, and linseed) on fatty acid composition in different tissues (longissimus lumborum muscle, tail fat, subcutaneous back fat and kidney fat). Averaged over tissue, safflower and sunflower seed was most effective (P<0.05) in enhancing the concentration of conjugated linoleic acid compared to rapeseed, linseed, and control (1.35% and 1.15% vs. 0.80%, 0.80%, and 0.75%, respectively). Linseed supplemented ewes had lesser n-6/n-3 value (2.48, P<0.05) compared to sunflower and safflower supplemented ewes (6.12 and 3.90, respectively). Fatty acid composition for most major fatty acids differed among tissues (P<0.05) but tissue differences varied depending on oilseed supplement (P<0.05). Proportions of conjugated linoleic acid were greatest in tail fat (1.54% vs. 0.82%, 0.79% and 0.70% for kidney, back, and muscle fat, P<0.05) as were total unsaturated fatty acids (49.1% vs. 42.4%, 36.7% and 33.4% for muscle, back, and kidney fat, P<0.05) and tail fat was the most responsive tissue to improvement in fatty acid profile through supplementation. Beneficial fatty acid content of tissues can be increased by oilseed supplementation, but the magnitude of increase varies according to tissue.
Peng
Y S
YS
Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, PR China.
Brown
M A
MA
Wu
J P
JP
Liu
Z
Z
D000273:Adipose Tissue / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D000821:Animal Feed; D000818:Animals; D001415:Back; D019587:Dietary Supplements; D005227:Fatty Acids / Q000032:analysis*; D005260:Female; D007668:Kidney / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D050356:Lipid Metabolism / Q000187:drug effects*; D019684:Magnoliopsida; D008460:Meat / Q000592:standards; D018482:Muscle, Skeletal / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D010938:Plant Oils / Q000494:pharmacology*; D012639:Seeds / Q000737:chemistry; D012756:Sheep / Q000378:metabolism; D013623:Tail / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D014018:Tissue Distribution
D005227:Fatty Acids; D010938:Plant Oils