Figure 1

Familial relationships considered in this study and segregation of most important haplotypes. A complex pedigree of 38 sires (squares) of GD families (G), ten sires of daughter design (DD) families, three maternal grandsire (M) families and 26 sampled and genotyped relevant ancestors; the pedigree has been simplified by showing only ancestors who made it possible to trace haplotypes from family-sires to the most important ancestors (A0, A1, A2); furthermore, to reduce the complexity of the figure, ancestor A1 is represented more than once; correspondingly, letters and numbers within squares of family-sires represent the internal family ID; non-genotyped individuals are represented by smaller circles (females) and squares (males) marked with a diagonal line; the estimated haplotype of 25 markers (A0 _H1 ) comprising a derived QTL allele affecting MY1 and PY1 with 97% CI between 117.962 Mb and 119.018 Mb is graphically presented by yellow bars above the individual's symbol; five other most frequent haplotypes are represented by five different coloured bars; introgression of Red-Holstein genes into the mapping populations is represented by ancestor A2 and the corresponding haplotype presented by a red bar; to reduce the complexity of the figure, 77 low frequency haplotypes are omitted; the allelic composition of the respective haplotypes is presented within the figure; the pedigree MS PED 2089 is a subset of the total material which can be constructed by keeping the families marked by a grey circle around squares and associated ancestors; pedigrees MS PED 1038 and SNP PED 421 are subsets of MS PED 2089 which can be constructed by removing appropriate families as described in material and methods; the pedigree SNP PED 308 consists of GD family G36 and animals across the entire mapping population but not descending from A0; the pedigree SNP PED 723 is a sum of pedigrees SNP PED 308 and SNP PED 421.