Seedling disease responses of wheat-rye line WR49-1, its rye parent German White, wheat parent Xiaoyan 6, and 38 different wheat genotypes possessing documented powdery mildew resistance (<i>Pm</i>) gene(s) or gene combinations to 23 different <i>Blumeria graminis</i> f. sp. <i>tritici</i> (<i>Bgt</i>) isolates.

Infection types 0–2 were resistant (R) and 3–4 were susceptible (S) as described by Si et al. (1992). R: resistant host reaction, S: susceptible host reaction, and—: no data. Seedling disease responses of wheat-rye line WR49-1, its rye parent German White, wheat parent Xiaoyan 6, and 38 different wheat genotypes possessing documented powdery mildew resistance (Pm) gene(s) or gene combinations to 23 different Blumeria graminis f. sp. tritici (Bgt) isolates.