Septoria tritici blotch (STB) disease caused by Zymoseptoria tritici is the most predominant disease on durum wheat in Tunisia, while its occurrence on bread wheat is rare. In this study, we investigated the performance of 89 wheat cultivars from Morocco, Algeria and Tunisia, screened in Tunisia for their relative resistance to STB. Field experiments were carried out in an augmented design, during 2016–17 and 2017–18 cropping seasons at two locations in Northern Tunisia: Beja (Oued Beja station) and Cap Bon regions (Menzel Temim and El Haouaria). All trials were conducted under natural infection. Visual disease assessments were quantified using the percentage of leaf area covered by pycnidia (PC), necrotic area (N), area under disease progress curve of each genotype (AUDPC) and the relative area under disease progress curve (rAUDPC). Results indicated that the majority of Tunisian, Algerian and Moroccan durum wheat populations (TDM, ADW and MDW) were susceptible to STB at both locations in Tunisia ranging from susceptible to highly susceptible, with the rAUDPC, N and PC ranging from 0.5 to 0.8, 30 to 65% and 40 to 75% respectively. On the other hand, the Moroccan bread wheat genotypes (MBW) were susceptible in Cap Bon area and resistant at Beja. Tunisian bread wheat genotypes (TBW) were resistant at both locations; with levels varying from immune to resistant classes where rAUDPC, PC and N did not exceed 0.2 and 10% respectively, with the exception of the local bread wheat variety known as “Farina Arbi” which was susceptible at Cap Bon and resistant at Beja.

小麦链霉菌引起的小麦黑斑病（STB）是突尼斯硬质小麦中最主要的病害，而面包小麦中很少见。在这项研究中，我们调查了来自摩洛哥，阿尔及利亚和突尼斯的89个小麦品种的表现，这些品种在突尼斯进行了筛选，以了解它们对STB的相对抗性。在突尼斯北部的两个地点（Beja（Oued Beja站）和Cap Bon地区（Menzel Temim和El Haouaria））的2016-17和2017-18种植季节，采用增强设计进行了田间试验。所有试验均在自然感染下进行。视觉疾病评估通过使用吡虫啉（PC）覆盖的叶面积百分比，坏死面积（N），每种基因型疾病进展曲线下面积（AUDPC）和疾病进展曲线下相对面积（rAUDPC）进行定量。结果表明，大多数突尼斯人，阿尔及利亚和摩洛哥硬粒小麦群体（TDM，ADW和MDW）在突尼斯的两个地区均易受机顶盒感染，范围从易感到高度易感，rAUDPC，N和PC的范围分别为0.5至0.8、30至65％和40至75 ％ 分别。另一方面，摩洛哥面包小麦基因型（MBW）在Cap Bon地区易感，在Beja地区具有抗性。突尼斯面包小麦的基因型（TBW）在两个地方均具有抗性。其水平从免疫级别到抗性级别不等，其中rAUDPC，PC和N分别不超过0.2％和10％，但当地的面包小麦品种“ Farina Arbi”除外，该品种在Cap Bon易感，而在Beja具有抗性。N和PC分别为0.5至0.8、30至65％和40至75％。另一方面，摩洛哥面包小麦基因型（MBW）在Cap Bon地区易感，在Beja地区具有抗性。突尼斯面包小麦的基因型（TBW）在两个地方均具有抗性。其水平从免疫级别到抗性级别不等，其中rAUDPC，PC和N分别不超过0.2％和10％，但当地的面包小麦品种“ Farina Arbi”除外，该品种在Cap Bon易感，而在Beja具有抗性。N和PC分别为0.5至0.8、30至65％和40至75％。另一方面，摩洛哥面包小麦基因型（MBW）在Cap Bon地区易感，在Beja地区具有抗性。突尼斯面包小麦的基因型（TBW）在两个地方均具有抗性。其水平从免疫到抗性等级不等，其中rAUDPC，PC和N分别不超过0.2％和10％，但当地的面包小麦品种“ Farina Arbi”除外，该品种在Cap Bon易感，而在Beja则具有抗性。