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Fig. 2. Revised genetic linkage map of the Chevron x M69 (CM) mapping population originally published in de la Peña et al. (1999). The bars are adjacent to the marker interval on the map in which the QTL was detected. QTL for kernel discoloration (KD) and grain protein concentration (GPC) are shown for individual environments and are coded to identify the environments in which they were detected (Cr95 = Crookston 1995; Mo95 = Morris 1995; Sp95 = St. Paul 1995; Sp97 = St. Paul 1997). See Tables 2 and 4 for parameter estimates for the QTLs identified for KD and GPC, respectively.