The Indian Journal of Genetics and Plant Breeding

Selection 212, a wheat-rye recombinant developed through homoeologous recombination between wheat and rye chromosomes using monosomic 5B of variety Chinese Spring was studied for inheritance of resistance against stern rust pathogen (Puccinia graminis f. sp. tritici). The F₁, the F₂, the h the BC₁F₁ and the BC₁F₂ generations of the crosses involving ‘Selection 212’ and two susceptible lines Agra Local and Chinese Spring were tested in seedlings with pathotypes 122 and 40A of P. graminis tritici. A single recessive gene that controlled resistance to both the pathotypes was determined. Correlated behaviour of the F₂ backcross families of the cross (Sel.212 x AL) x AL with both the pathotypes revealed that the same resistance gene is providing resistance to pathotypes 122 and 40A. In addition, an adult plant resistance gene Sr2 was also identified.