When tested in two or four pairs of genotype pools with contrasting resistance to late blight (R and S pools), at three infection time points and in three independent infection experiments, the SuperSAGE expression pattern of nine genes (ACRE20, Pubq, SLP, PME, SMO, DSD, MPP, HPR, UPA18) was reproducible in more than 70 percent of all comparisons between R and S genotype pools and that of four genes (CCAP, HSP70, BCCP, MADS) was reproducible in 60 to 70 percent (Tables 3, 4). The gene discussed is HPR; the disease is infection.