Evaluation of the susceptibility of modern, wild, ancestral, and mutational wheat lines to Septoria tritici blotch disease

Abstract Globally, bread wheat production is threatened by fungal diseases, including the devastating disease Septoria tritici blotch (STB). Given global importance of STB, and difficulty in identifying novel sources resistance to this disease, we screened a variety genotypes, wild, ancestral, mutagenized lines, for their STB response. This delineated panel wild relatives Watkins collection lines with exceptional range Zymoseptoria isolates, some which are highly virulent on modern, elite varieties. Additionally, characterized susceptibility 500 cultivar Cadenza TILLING population developed backcross derivatives two that show dominant partial STB. These partially resistant multiple isolates Z . , and, ancestral identified, provide useful reservoir STB‐resistant germplasm use breeding programmes.