Fig. 1. Segregation ratios of SSR markers in different F2 populations. The linkage groups were according to Cregan et al. (1999). Linkage groups A, B, and C were developed by USDA/Iowa State Univ., the Univ. of Utah, and the Univ. of Nebraska, respectively. Segregation ratios were based on marker classes of Triplo 4: F1: PI 407287.