Influence of alien chromosomes on the resistance of soft wheat to biotrophic fungal pathogens

Abstract

The resistance of 77 disomic chromosome-addition and chromosome-substitution lines of soft wheat that had been created on the base of the Chinese Spring variety to Belorussian populations of powdery mildew and brown leaf rust is studied. The lines possess a chromosome pair introduced from 13 species of cereals as well as three amphiploids. New genes that express resistance to biotrophic fungal pathogens in chromosomes 2Ss and 5Ss from the Aegilops searsii species and chromosome 6Rm from the Secale montanum species were discovered. We do not exclude the possibility that the new resistance gene against powdery mildew is carried by chromosome 6S1 from the species Aegilops longissima (line No. 4), and that the new resistance gene against brown leaf rust is carried by chromosome 3E from the species Elytrigia elongata.