Effects of polymorphisms in the 30 untranslated region of the porcine PPARGC1A gene on muscle fiber characteristics and meat quality traits

Jun Seong Lee, Jun Mo Kim, Jae Sang Hong, Kyu Sang Lim, Ki Chang Hong, Young Sik Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Peroxisome proliferator-activated receptor c coactivator 1 a (PPARGC1A) is a transcriptional coactivator that is involved in a variety of biological processes including muscle fiber type composition. Here, we identified two single nucleotide polymorphisms (SNPs; *2690T>C and *2864T>C) and one insertion/deletion in the 30 untranslated region of porcine PPARGC1A. These SNPs were genotyped by direct sequencing in a total of 439 pigs representing three different pig breeds (Berkshire, n = 156; Yorkshire, n = 163; Landrace, n = 120). We evaluated the effects of diplotypes of individual PPARGC1A 30UTR SNPs on muscle fiber characteristics and meat quality traits. The *2690T>C polymorphism was significantly associated with the percentage of type I and IIb fibers for both muscle fiber number and area composition (P<0.05), and also showed a significant association with muscle pH, a parameter of meat quality (P = 0.0188). The *2864T>C polymorphism was also associated with meat quality traits including muscle pH (P = 0.0071), drip loss (P = 0.0006), and lightness (P = 0.0702), but showed no significant association with muscle fiber characteristics. Interestingly, each SNP affected PPARGC1A expression significantly at the protein level but not at the mRNA level, thereby accounting for phenotypic variability among genotypes. Taken together, our data suggest that the *2690T>C and *2864T>C polymorphisms can be used as genetic markers for selection toward improved meat quality.

Original languageEnglish
Pages (from-to)3943-3950
Number of pages8
JournalMolecular biology reports
Volume39
Issue number4
DOIs
Publication statusPublished - 2012 Apr

Keywords

  • 30UTR
  • Meat quality
  • Muscle fiber type composition
  • PPARGC1A
  • Single nucleotide polymorphism

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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