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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2006;19(11): 1529-1535.
https://doi.org/10.5713/ajas.2006.1529    Published online September 29, 2006.
Leptin Polymorphisms Associated with Carcass Traits of Meat in Korean Cattle
Hyun Sub Cheong, Du-Hak Yoon, Lyoung Hyo Kim, Byung Lae Park, Eui Ryong Chung, Han Ju Lee, Il-Cheong Cheong, Sung-Jong Oh, Hyoung Doo Shin
Leptin has been investigated as a candidate gene for fat characteristics in beef cattle. Previously, we have reported 57 sequence variants discovered in Korean cattle (Bos Taurus coreanae). In this study, we examined the association between polymorphisms of leptin and carcass traits (cold carcass weight (CWT) and marbling score (Marb)) in Korean cattle. Among 57 polymorphisms, 11 common polymorphic sites were genotyped in our beef cattle (n = 437). Statistical analysis revealed that one single nucleotide polymorphism in coding exon (c.+411T>C (A137A)) showed a significant association with the yield trait, CWT. The C-bearing genotypes (CC or CT) of c.+411T>C (A137A) showed the higher CWT (p = 0.006). c.+150C>G (S50S) also showed a significant association with the quality trait, Marb (p = 0.01). Our findings suggest that polymorphisms in leptin might be one of the important genetic factors that influence carcass yield and quality in beef cattle, especially in CWT and Marb.
Keywords: Leptin; Cold Carcass Weight; Marbling Score; Polymorphism

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