Behavior of Spanish durum wheat genotypes against Zymoseptoria tritici: resistance and susceptibility

Aim of study: Septoria tritici blotch (STB), caused by the fungus Zymoseptoria tritici, is one most important wheat diseases worldwide, affecting both bread and durum wheat. The lack knowledge about interaction with Z. together limited resources resistant material, have led to a rising threat for cultivation, particularly in Mediterranean Basin. In Spain, STB has increased its incidence last few years, leading higher costs fungicide applications control disease. Therefore, identification new sources resistance through breeding stands out as an efficient method facing STB.Area experimental study was conducted growth chambers at IFAPA facilities Córdoba (Spain).Material methods: percentage necrotic leaf area, disease severity, pycnidium development image analysis were evaluated from 48 Spanish accessions (breeding lines commercial cultivars) against isolate Córdoba.Main results: Two six cultivars showed responses limiting or reproduction ability, while other 40 presented susceptible response.Research highlights: Provided these genotypes, future programs could be developed, incorporating agronomic traits STB.