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http://dx.doi.org/10.5187/JAST.2010.52.1.009

Effect of the Fatty Acid Synthase Gene for Beef Quantity Traits in Hanwoo Breeding Stock  

Kim, Sang-Wook (College of Agriculture, Life and Environment Sciences, Chungbuk National University)
Lee, Jun-Heon (College of Agriculture, and Life Sciences, Chungnam National University)
Kim, Jin-Ho (Hanwoo Improvement Center, Nonghyup)
Won, You-Seog (Hanwoo Improvement Center, Nonghyup)
Kim, Nae-Soo (College of Agriculture, Life and Environment Sciences, Chungbuk National University)
Kim, Kwan-Suk (College of Agriculture, Life and Environment Sciences, Chungbuk National University)
Publication Information
Journal of Animal Science and Technology / v.52, no.1, 2010 , pp. 9-16 More about this Journal
Abstract
A previous study has shown that the g.17924G>A polymorphism of fatty acid synthase (FASN) is associated with unsaturated fatty acid composition in the Hanwoo beef, hence this study was conducted to evaluate the effect of single nucleotide polymorphisms (SNPs) within FASN gene on the selection phenotypes of Hanwoo breeding stock. A total of 925 progeny test steers were used to genotype g.11280G>A, g.13125T>C, and g.17924G>A polymorphisms and significant associations were found among g.11280G>A, g.17924G>A, and carcass traits, such as carcass weight, backfat thickness, and beef quantity index. No significant association was found between g.13125T>C and carcass traits. Although the degree of linkage disequilibrium (LD) was not strong among g.11280G>A, g.13125T>C, and g.17924G>A in the LD analysis, four major haplotype classes were formed with the genotypic information within the FASN gene; the frequencies of the halpotypeswere -GCG-[0.378], -ATG-[0.301], -GTA-[0.191], and -ACG-[0.063], respectively. Phenotypic association was performed among these haploptypes, and the haplotype 2 (-ATG-)was significantly associated with higher carcass weight when compared to the other haplotypes, i.e. haplotype 1 (-GCG-) and haplotype 3 (-GTA-). A copy number of the FASN haplotype 3 (-GTA-) had also a significant association with carcass weight of subjects. In conclusion, it was observed that two polymorphisms (g.11280G>A and g.17924G>A) and their haplotypes within the FASN gene are consistently associated with carcass traits. Therefore, it is desirable to use the FASN polymorphisms for pre-selection program as genetic marker with improved carcass yield and beef quality of the Hanwoo sire at the Hanwoo Improvement Center as well as for commercial Hanwoo producers, the FASN genotypic information can be used for a part of selecting Hanwoo dam for superior calf production.
Keywords
FASN; SNP; Haplotype; Selection; Hanwoo;
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