1990 Volume 61 Issue 12 Pages 1077-1083
The objective of this study is to determine the breed effects on the concentration of individual fatty acids and the molecular distribution of triacylglycerol (TG) isolated from three different adipose tissues, the subcutaneous, inter-muscular and anterior portions of the kidney knob. Data collected from 21 straightbred and 21 crossbred steers of Brahman sire×Japanese black, Japanese Shorthorn and Holstein dams were obtained from the Tohoku University beef cattle herd at the Kawatabi Experiment Station. All steers were fattened with the same feedlot treatment after pasturing.
Significant breed differences exist between these variates. Marked significant differences in fatty acid composition were found between the cross-and the purebred judging from the means in the percentages of C16:0, C18:0 and C18:1 and in the ratio of 18:1 to 18:0 (OS ratio). Triacyl glycerols from Brahman crossbreds were significantly higher in C16:0 and C18:0 and lower in C18:1 and OS ratio than those of purebreds. Significant breed differences were also found in comparisons of TG molecules. TG from Brahman crossbred steers were significantly higher in concentration of C48 and C50 TG and lower in C52 and C54 TG than those of purebreds.
