Septoria tritici blotch (STB), caused by Zymoseptoria tritici, is an important disease of wheat worldwide. This study was performed to investigate the efficacy of Stb genes against 10 isolates of Z. tritici and to elucidate the resistance response pattern of 185 wheat genotypes to STB. The 10 isolates showed different virulence patterns on the Stb differentials. Effectiveness determination showed that most Stb genes (particularly Stb1–Stb9) were ineffective against the 10 isolates, whereas Kavkaz-K4500 (possessing Stb10, Stb12), Arina and Riband (possessing Stb15), and M3 (possessing Stb16 and Stb17) were resistant to all isolates tested. Of the 185 wheat genotypes, 72% were susceptible to all isolates, indicating that these genotypes lacked any effective resistance genes at the seedling stage against the isolates used. The remaining 51 genotypes showed specific resistance to one or more isolates, suggesting that they contain at least one effective resistance gene. Six genotypes were resistant to all isolates, indicating that they may possess broad-spectrum resistance gene(s) or a combination of diverse uncharacterised Stb genes that could be effectively used in breeding programs.

小麦链霉菌（Zymoseptoria tritici）引起的小麦黑斑病（STB）是全世界小麦的重要病害。进行这项研究是为了研究Stb基因对10株小麦的Z.tritici的功效，并阐明185个基因型的小麦对STB的抗性应答模式。这10个分离株在Stb差异上显示出不同的毒力模式。有效性测定表明，大多数Stb基因（特别是Stb1 – Stb9）对10种分离物无效，而Kavkaz -K4500（具有Stb10，Stb12），Arina和Riband（具有Stb15）），M3（具有Stb16和Stb17）对所有测试的分离株均具有抗性。在185个小麦基因型中，有72％对所有分离株敏感，表明这些基因型在苗期对所用分离株缺乏任何有效抗性基因。其余的51个基因型表现出对一种或多种分离物的特异性抗性，表明它们含有至少一种有效的抗性基因。六种基因型对所有分离物均具有抗性，表明它们可能具有广谱抗性基因或可以有效用于育种程序的多种未鉴定的Stb基因的组合。