Abstract: CH5382 is a stable cryptic alien introgression carrying resistance genes of Thinopyrum intermedium.It was highly resistant to both powdery mildew and stripe rust disease.To determine the resistance inheritances in it,CH5382 was crossed with three susceptible cultivars(line).The adult tests of F1,F2 and F3 progenies from these crosses and their parents were inoculated with Egt isolate E09 in Taiyuan greenhouse and with mixed Pst isolates including CYR32 at Sichuan disease nursery,respectively.It was consistent to both powdery mildew(IT 0) and stripe rust(IT 0;) for F1 plants and their resistant parent CH5382,indicating complete dominance of the two resistances in these crosses.Powdery mildew resistant and susceptible segregation ratios satisfactorily fit 3R ∶ 1S in the F2 populations and segregation ratios for stripe rust reaction of F2 progenies from these crosses suit 3R ∶ 1S.The F2：3 lines displayed a segregation ratio of 1(all R) ∶ 2 segregating ∶ 1(all S),demonstrating that the powdery mildew resistance and stripe rust resistance in CH5382 were conferred by a single dominant gene separately.

Key words: Wheat, Thinopyrum intermedium, Powdery mildew, Stripe rust, Resistance inheritance

CLC Number: 

• S512.1