Examination of intramuscular lipid in livestock shows that there is a large total lipid content and a low ratio of polyunsaturated to saturated fatty acids in animals selected by man for rapid growth.On the other hand those animals that have arisen by natural selection,or in some cases have been selected by man for low energy requirement, have little intramuscular fat and high polyunsaturate to saturate ratios.Also it appears that by using certain genotype x diet interactions that it may be possible to alter the type of long chain fatty acid (e.g.C-18,C-20 and C-22) in meat from sheep and cattle.Some types of these acids are considered useful in affecting factors associated with coronary heart disease in humans.

B. D Siebert

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XI. Genetics of reproduction, lactation, growth, adaptation, disease, and parasite resistance., , 302–305, 1986
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