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31 March 2016 Effects of a non-synonymous CBG gene single nucleotide polymorphism (SNP) on meat-quality traits in Berkshire pigs
Seul Gi Kwon, Jung Hye Hwang, Da Hye Park, Tae Wan Kim, Deok Gyeong Kang, Kyung Hee Kang, Il-Suk Kim, Jeongim Ha, Chul Wook Kim
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Abstract

Corticosteroid-binding globulin (CBG) is a plasma transport protein that has glucocorticoid-binding activity. In the present study, we identified CBG gene expression in several tissues of four pig breeds: Berkshire, Duroc, Landrace, and Yorkshire. Expression of CBG mRNA was detected in the liver of all four breeds, and was the highest in Berkshire pigs. We also found single nucleotide polymorphisms (SNPs) in the CBG gene from Berkshire pigs, including SNP c.919G>A, which corresponds to 307G>R. We analyzed the relationships between this CBG variant and various meat-quality traits. The SNP was significantly associated with backfat thickness, post-mortem pH24h, meat color [CIE a* (redness), CIE b* (yellowness)], water-holding capacity, fat content, moisture content, protein content, cooking loss, and shear force. However, the effects differed by gender: the values were significantly associated with almost all traits in gilts, whereas only cooking loss and shear force were shown significantly in barrows. The variant G allele was associated with decreases in backfat thickness, post-mortem pH24h, CIE a*, fat content, and cooking loss, but with increases in CIE b*, water-holding capacity, moisture content, protein content, and shear force. Because the general correlation between meat-quality traits were not validated in the present study, we suggest that certain SNP might be used in the restrictive application to distinguish meat-quality traits.

Seul Gi Kwon, Jung Hye Hwang, Da Hye Park, Tae Wan Kim, Deok Gyeong Kang, Kyung Hee Kang, Il-Suk Kim, Jeongim Ha, and Chul Wook Kim "Effects of a non-synonymous CBG gene single nucleotide polymorphism (SNP) on meat-quality traits in Berkshire pigs," Canadian Journal of Animal Science 96(1), 45-51, (31 March 2016). https://doi.org/10.1139/cjas-2015-0074
Received: 16 April 2015; Accepted: 1 September 2015; Published: 31 March 2016
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