Fig. 2From: Association mapping of North American spring wheat breeding germplasm reveals loci conferring resistance to Ug99 and other African stem rust racesA scatter plot of principal component 1 (PC1) plotted against principal component 2 (PC2). All 241 lines in the AM panel are represented by a symbol, with lines of each breeding program labeled by different symbol and distinct color. Proportion of the variance explained by the principal component values are indicated in parenthesisBack to article page