EFFECT OF BETAINE SUPPLEMENTATION AND BREED ON THE FATTY ACID
COMPOSITION AND ADIPOCYTE SIZE AND DISTRIBUTION IN BACKFAT
AND MUSCLE LIPIDS IN PIGS
Teodora
Popova, Penka Marinova, Veselka Vasileva
Institute of
Animal Science, Kostinbrod, Bulgaria
tlpopova@yahoo.com
A comparison was made between pigs from the Danube
white breed (DW) and the cross breed Danube white ´ Landrace
(DW ´ L) to study the effect of betaine supplementation and breed on the fatty
acid composition of the triacylglycerols in the backfat and m.
longissimus dorsi, as well as the adipocyte size and distribution in
these depots. The fatty acid composition was mostly influenced by the
animal breed, compared to the betaine supplementation. Pigs from DW ´ L showed
significantly lower amounts of 18:0 (P<0.01) in the backfat and 14:0
in the muscle triacylglicerols (P<0.01) than DW. The proportion of
16:0 was influenced by both betaine (P<0.05) and breed (P<0.01) in
muscle triacylglycerols. Breed affected significantly the content of
monounsaturated fatty acids in the backfat as the pigs of DW breed had
lower amounts of 16:1 (P<0.05) and 18:1 (P<0.01), but the content
of the latter was dependent on the presence of betaine as well (P<0.05).
After betaine supplementation the average size of the adipocytes in the
backfat was lower in DW and higher in DW ´ L
(P<0.05). Compared to the DW the crossbred pigs had significantly
higher diameter of the adipose cells (P<0.001). Breed influence on the
adipocytes distribution in backfat and two of the cell populations in the
muscle was highly significant (P<0.001). Dietary betaine supplementation affected only one cell population
for both backfat and longissimus muscle (P<0.05).
Key words: pigs;
betaine; breed; fatty acids; adipocytes
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