Fig. 2. Relative location of QTL detected by composite interval mapping for rind penetrometer resistance for four populations. Horizontal bars represent QTL peak locations and vertical bars represent a one-LOD confidence interval. Population 1 (MoSCSSS-High1 x MoSQB-Low)F2:3, Population 2 (MoSCSSS-High2 x MoSCSSS-Low)F2:3, Population 3 (MoSCSSS-High3 x Mo47)F2:3, and Population 4 (B73 x Mo47)F2:3. Linkage map is based on Population 3; refer to Flint-Garcia et al. (2003)(this issue) and Jampatong et al. (2002) for individual linkage maps.