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KMID : 1025520050470010001
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Journal of Animal Science and Technology
2005 Volume.47 No. 1 p.1 ~ p.10
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Detection of Novel Mutations in the FABP3 Promoter Region and Association Analysis with Intramuscular Fat Content in Pigs
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Kim J.-H.
Park Eung-Woo
Park J.-J.
Choi Bong-Hwan
Kim Tae-Hun
Seo Bo-Yeong
Cheong I. C.
Lim Hyun-Tae
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Abstract
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Intramuscular fat content(IMF) is considered as one of major economic traits in the pig breeding and industry. In general, high IMF results in better meat quality. Several approaches to detect quantitative trait loci(QTL) for IMF indicated a strong possibility of the existence of a QTL related to IMF between the microsatellite marker SW71 and SW1881 on SSC6q. Porcine FABP3 has been considered as a candidate gene affecting IMF due to its physiological roles and position on the pig genome. Two novel mutations, g.-114T>C and g.-158T>G were detected by duplicate sequencing of the porcine FABP3 promoter region. These two mutations were identified as absolute linkage disequilibrium. The g.-158T>G mutation was used for investigating relationships with growth and fat deposition traits. The GG genotype of the g.-158T>G polymorphism showed highly negative effects(P<0.01) on body weights at 3 and 12 weeks of age, and a positive effect(P<0.05) on IMF. However, backfat thickness(BF) and carcass fat(CF) content were not significantly associated with the genotype. The result indicates that the novel mutations, identified in this study, could be utilized as possible genetic markers to improve IMF, independent with BF.
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KEYWORD
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QTL, Intramuscular fat content, FABP3, Novel Mutations, Relationship
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