Fig. 2. Plot of coefficient of parentage (CP) relationship among six clusters representing 54 Japanese soybean cultivars released from 1950 to 1988. Coordinates for a cultivar were obtained from multidimensional scaling analysis employing two dimensions based on CP relations. The complement of the linear distances (1 - Distance) between any two cultivars estimates the coefficient of parentage between them. Distances 1 indicate no relationship. For cultivar codes, see Table 1.