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

Abstract

Abstract TIBL‐1RS wheat‐rye translocation cultivars utilized in wheat programmes worldwide carry powdery mildew resistance gene Pm8 . Cultivar‘Amigo’possesses resistance gene Pm17 on its TIAL‐1RS translocated chromosome. To be able to use Pm17 efficiently in breeding programmes, this gene was transferred to a TIBL‐1RS translocation in line Helami‐105, and allelism between Pm8 and Pm17was studied. The progenies of the hybrids in the F 2 generation and F 3 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 1 A and 1B, respectively.