Evidence of allelism between genes Pm8 and Pm17 and chromosomal location of powdery mildew and leaf rust resistance genes in the common wheat cultivar 'Amigo'

T1BL-1RS wheat-rye translocation cultivars utilized in wheat programmes worldwide carry powdery mildew resistance gene Pm8. Cultivar 'Amigo' possesses resistance gene Pm17 on its T1AL-1RS translocated chromosome. To be able to use Pm17 efficiently in breeding programmes, this gene was transferred to a T1BL. 1RS translocation in line Helami-105, and allelism between Pm8 and Pm17 was studied. The progenies of the hybrids in the F₂ generation and F₃ families provided evidence that the two genes are allelic. Genetic studies using monosomic analyses confirmed that in cultivar 'Amigo', Pm17 and leaf rust resistance gene Lr24 are located on a translocated chromosome involving 1A and 1B, respectively.