Distribution of the 163 eQTL detected from three experiments for the 52 genes (3 genes without eQTL detected) differentially expressed in QTL-specific NILs. Blue diamond, red dots and green triangles represent eQTL identified by Potokina et al. , Chen et al.  and Wise et al. (unpublished results) respectively. eQTL co-located with Rphq 2 and Rphq 3 were framed with dash-lined arrows. Significance levels of eQTL detected in the St/Mx population refer to LOD score, those with 'Q × SM' population refer to LRS.