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Quantitative Trait Locus Analysis of Stalk Strength in Four Maize Populations

^a Genetics Department, North Carolina State University, Gardner Hall, Raleigh, NC 27695
^b National Corn and Sorghum Research Center, Kasetsart Univ., Klangdong, Pakchong, Nakhonratchasima 30320, Thailand
^c USDA-ARS Plant Genetics Research Unit and Department of Agronomy, University of Missouri-Columbia, Curtis Hall, Columbia, MO 65211

View larger version (45K): [in a new window]   Fig. 1. Frequency distribution of F2:3 family means for rind penetrometer resistance. (A) Population 1 (MoSCSSS-High1 x MoSQB-Low)F2:3, (B) Population 2 (MoSCSSS-High2 x MoSCSSS-Low)F2:3, (C) Population 3 (MoSCSSS-High3 x Mo47)F2:3, and (D) Population 4 (B73 x Mo47)F2:3. All populations are displayed on a similar scale for comparison purposes.

View larger version (23K): [in a new window]   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.