Linkage and QTL mapping for Sus scrofa chromosome 5.

Linkage maps of Sus scrofa chromosome 5 (SSC5) were constructed using up to 10 markers in three informative F2 families based on Wild Boar (W), Meishan (M) and Pietrain (P) crosses. The map lengths differed among the families. In the M × P family, the MYF5 locus was linkage mapped between SW995 and SW967. Relatively few quantitative trait loci (QTLs) were observed on SSC5 explaining a maximum of 5.8% of phenotypic variance in the F2 generation. The presence and position of QTLs were not consistent among families. The Meishan and Wild Boar QTL allele effects were inferior compared with Pietrain allele effects. The additive effects were small and reasonably strong dominance-effects were observed. QTLs affecting conductivity in the W × M family and food conversion ratio in the M x P family mapped near MYF5, while the QTL affecting conductivity in the M x P family was located near IGF1. [ABSTRACT FROM AUTHOR]