Figure 3

Variation of the LOD score profiles along chromosome 4 for fiber length measurements. Graphical representation of the variation among 11 data sets of the LOD score profiles (upper panel) and of the observed additivity effect (in mm) as conferred by the Gh parent (lower panel) along chromosome 4 for fiber length measurements (either HVI-based, as Upper Half Mean Length, UHML or Mean Length, ML, or AFIS-based, as Upper Quartile Length per weight, UQLw). Phenotypic data were obtained from 11 experiments of the RIL population and analyzed with WinQTL Cartographer by composite interval mapping (loci positioned on the RIL map). The 2 horizontal lines correspond to 2 different LOD thresholds: the permutation-based (1000 permutations) threshold averaged from the 11 sets, ie LOD = 3.5 (dotted line), and an arbitrary value of LOD = 2 (solid line).