Identification of quantitative trait loci for carcass composition and meat quality traits in a commercial finishing cross

H.J. van Wijk, B.W. Dibbits, E.E. Baron, A.D. Brings, B. Harlizius, M.A.M. Groenen, E.F. Knol, H. Bovenhuis

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A QTL study for carcass composition and meat quality traits was conducted on finisher pigs of a cross between a synthetic Pie¿train/Large White boar line and a commercial sow cross. The mapping population comprised 715 individuals evaluated for a total of 30 traits related to growth and fatness (4 traits), carcass composition (11 traits), and meat quality (15 traits). Offspring of 8 sires (n = 715) were used for linkage analysis and genotyped for 73 microsatellite markers covering 14 chromosomal regions representing approximately 50% of the pig genome. The regions examined were selected based on previous studies suggesting the presence of QTL affecting carcass composition or meat quality traits. Thirty-two QTL exceeding the 5% chromosome-wise significance level were identified. Among these, 5 QTL affecting 5 different traits were significant at the 1% chromosome-wise level. The greatest significance levels were found for a QTL affecting loin weight on SSC11 and a QTL with an effect on the Japanese color scale score of the loin on SSC4. About one-third of the identified QTL were in agreement with QTL previously reported. Results showed that QTL affecting carcass composition and meat quality traits segregated within commercial lines. Use of these results for marker-assisted selection offers opportunities for improving pork quality by within-line selection
Original languageEnglish
Pages (from-to)789-799
Number of pages11
JournalJournal of Animal Science
Volume84
Issue number4
DOIs
Publication statusPublished - 2006

Keywords

  • influencing economic traits
  • large white intercross
  • genome scan analysis
  • pig skeletal-muscle
  • sus-scrofa
  • meat quality
  • body-composition
  • glycogen-content
  • igf2 locus
  • qtl

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