QTL detection with DNA markers for wool traits in a sheep backcross Sarda x Lacaune resource population
Résumé
Abstract: A QTL detection experiment was organized in a backcross Sarda x Lacaune sheep resource population. The aim of this experiment was the search for loci influencing milk production and several other traits including wool traits through a whole genome scan on 968 females from 10 sire families. Ten fleece characteristics: greasy fleece weight, length of long and fine wool as well as fibre diameter (mean and CV), fibre curvature (mean and CV) and medullation content (objectionable, flat and medullated fibres) using OFDA methodology were measured on 892 6- months old females. High significant QTL's affecting 8 wool traits detected on chromosome 25 suggest that a gene with major effect on fleece characteristics is located on this chromosome. Other putative QTL's were also detected on chromosome 1, 10, 14, 15, 18 and were discussed.