Fig. 4

Schematic representation of the fine mapping of a QTL using the HIF approach. (a) One major QTL on chromosome 2. The horizontal dashed line indicates the threshold determining whether there a QTL exists. The black shadow indicates the QTL peak and confidence interval. (b) HIF types exhibiting heterozygosity within the QTL region. The dashed line indicates the physical boundaries of the heterozygous intervals. The white, black and gray rectangles indicate the identity of two homozygotes and a heterozygote, respectively. (c) Potential resolution of QTL refinement based on the one-round HIF approach