Association of Polymorphisms in the Bovine Leptin Gene with Ultrasound Measurements for Improving in Korean Cattle

  • Kong, H.S. (Animal Products Grading Service) ;
  • Oh, J.D. (Genomic Informatics Center, Hankyong National University) ;
  • Lee, S.G. (Genomic Informatics Center, Hankyong National University) ;
  • Hong, Y.S. (Genomic Informatics Center, Hankyong National University) ;
  • Song, W.I. (Genomic Informatics Center, Hankyong National University) ;
  • Lee, S.J. (Genomic Informatics Center, Hankyong National University) ;
  • Kim, H.C. (National Livestock Research Institute, RDA) ;
  • Yoo, B.H. (Namyangju-city Agricultual Information System) ;
  • Lee, H.K. (Genomic Informatics Center, Hankyong National University) ;
  • Jeon, G.J. (Genomic Informatics Center, Hankyong National University)
  • Received : 2005.11.29
  • Accepted : 2006.05.09
  • Published : 2005.12.01


The identification method that inflects real time ultrasound (RUT) and the potential application of marker assisted selection (MAS) for improvement of a cow population of Hanwoo (Korean Native cattle) was studied. The averages of RUT longissimus muscle area, RUT fat thickness, and RUT marbling score scanned at the 13th rib were 55.78 $cm^2$, 3.70 mm and 3.83 scores, respectively. We investigated the effects of the two SNPs (Kpn2 I and Msp I) in the leptin gene on carcass traits for Hanwoo cows by using ultrasound measurements. Genotype CC of the Kpn2 I had a significantly higher effect on back fat thickness (4.23 mm) and longissimus muscle area (57.57 $cm^2$) than genotype TT (3.14 mm, 53.93 $cm^2$, respectively, p<0.05). Genotype AA of the Msp I had a significantly higher effect only on marbling score (5.37) than genotype AB (3.57, p<0.05) and BB (3.37, p<0.05). Significant effects of SNPs in the leptin gene were found for the ultrasound measures of body composition in live cattle.


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