Fig. 4.

Mixed model QTL profile for ear height at chromosome 10. On the left without structuring VCOV of founders, i.e., assuming unrelated founders. On the right structuring VCOV using pedigree and marker information, i.e., introducing linkage disequilibrium information. The upper panels show the test for the detection of a putative QTL segregating in both heterotic groups. The middle (lower) panels show a test for a QTL effect in heterotic group 1 (2). The dashed horizontal lines mark a point wise significance threshold at test level 0.01