Distribution Of Molecular Markers Related To Meat Quality Traits In Five Cattle Populations

Fatty acid compositions,an important indicator for evaluation of meat quality,affect the quality and flavor of beef and could be improved through the changes of feed formula.Recent studies have shown that genetic selection can improve fatty acid composition in cattle breeding.This study was designed to investigate the genetic diversity of single nucleotide polymorphisms(SNPs)g.3691G>A in FABP4 gene and g.16024A>G in FASN gene,which have been proved to affect the fatty acid composition in Japanese Black cattle and Korean cattle,in Mongolia cattle,Luxi cattle,Xiangxi cattle and Guangxi cattle.Comparison analyses of dominant allele frequencies were then performed between every two breeds or populations of Mongolian,Luxi,Xiangxi,Guangxi,Japanese Black,Japanese Brown,Korean,Holstein,Frevich,Hereford and Angus cattle.The results showed that the distribution of the dominant allelic frequencies related to fatty acid composition in Chinese cattle breeds gradually decreased from north to south geographically and was significantly higher in Mongolia cattle breed than that of other Chinese cattle breeds.