Fig. 2 Chi-square contingency-test contours for seedling stripe rust IT scored as a binary (R, S) trait in Synthetic/Opata wheat RILs. Key to plot labels: 1 4E14_RS, response to race 14E14 at standard temperatures; Yr28, Yr18', resistance responses of these assigned genes to challenge with race MEX96-11. Markers are arrayed in map order with short arms of chromosomes at right. Chromosome lengths reflect numbers of markers, not genetic length