Evaluation of powdery mildew resistance and molecular detection of resistance genes in an international wheat collection

Wheat powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a widespread airborne fungal disease which seriously threatens wheat production worldwide. Resistance to the can be lost quickly due limited number of resistance genes in varieties and high variation mildew pathogen. Therefore, it critical explore new breed durable resistant varieties. The objectives this study were evaluate at seedling adult stages, detect presence Pm 332 germplasms from an international collection using molecular markers. It was determined that only seven, four, two accessions Bgt races E09, E15, A13, respectively. All tested fully susceptible race A44 stage. A total 34 plant Molecular tests known showed 107 did not contain any genes. Additionally, 119 found carry Pm38, 113 may have carried Pm8, 27 Pm21, 22 Pm60, 16 Pm24, Pm41, 5 Pm5e, 2 Pm46, Pm2a detected. By characterizing provides sources for expanding genetic diversity developing with mildew.