The two major types of lipids in the longissimus muscle (LM) are triacylglycerols (TAG) and phospholipids (PL). The objective of this study was to determine the effects of breed, sex and HAL-1843TM genotype on the fatty acid composition of TAG and PL in LM using purebred pigs fed the same diets. It was found that this report demonstrates that breed and sex were significantly associated with the content of TAG and with the fatty acid composition of
TAG and PL in LM. The HAL-1843TM genotype had minor effects on the concentrations of a few fatty acids in TAG and PL. These results suggest that the effects of breed and sex on fatty acid composition of LM observed in our previous study (Zhang et al. 2007) are the net results of the influences of breed and sex on TAG content and the impact of breed
and sex on TAG and PL fatty acid composition.