Evaluation of shape Aegilops tauschii Coss for resistance to physiological strains CYR30 and CYR31 of wheat stripe rust in China

Stripe rust is one of the most serious diseases of wheat in China. Two new stripe rust physiological strains CYR₃₀ (Inter. name: 175 E 191) and CYR₃₁ (Inter. name: 239 E 175) have become the dominant and epidemic physiological strains since 1994 in China. Resistance to these strains of 48 Ae. tauschii accessions was evaluated at the seedling and adult stages. Out of 48, 28 accessions displayed seedling and adult resistance. All of the Chinese Ae. tauschii accessions were susceptible at seedling and adult stages. Seedling resistance was highly related to adult resistance in Ae. tauschii. The new genetic resources of resistance to CYR₃₀ and CYR₃₁ could be incorporated into commercial wheat varieties for wheat resistance breeding by direct hybridization.