Detection of quantitative trait loci for carcass traits in the pig by using AFLP

Mamm Genome. 2002 Apr;13(4):206-10. doi: 10.1007/s00335-001-3052-4.

Abstract

For evaluation of the suitability of Amplified Fragment Length Polymorphism (AFLP) for detection of quantitative trait loci in farm animals, a combination of AFLP and selective genotyping has been applied as a rapid screening method for marker-QTL associations. Focusing on loci affecting eye muscle area, six extreme discordant sib pairs were selected from a Duroc x Berlin Miniature Pig F2 experimental cross and examined by using 48 AFLP primer combinations. Two prominent AFLP markers were converted into simple codominant PCR markers ( STS-Bo1 and STS-Bo3) and assigned to Sscr4 by physical and linkage mapping. Single marker analysis indicated association of the STS markers with a putative QTL influencing eye muscle area. Interval mapping confirmed the presence of a significant QTL for eye muscle area (Pgenomewide < 0.01) on the Sscr4, with STS-Bo1 being the closer marker. At the same location, significant effects (Pgenomewide < 0.01) on carcass length and backfat thickness were also detected. Our results demonstrate the capability of the combination of AFLP analysis and selective genotyping as a method for detection of genome regions containing QTL in livestock.

MeSH terms

  • Animals
  • Body Constitution
  • Chromosome Mapping
  • Genetic Markers
  • Polymerase Chain Reaction
  • Polymorphism, Restriction Fragment Length
  • Quantitative Trait, Heritable*
  • Swine / genetics*

Substances

  • Genetic Markers