Yang Nannan, Ovenden Ben, Baxter Brad, McDonald Megan C, Solomon Peter S, Milgate Andrew
NSW Department of Primary Industries, Wagga Wagga Agricultural Institute, Wagga Wagga, NSW, Australia.
University of Birmingham, School of Biosciences, Birmingham, West Midlands, United Kingdom.
Front Plant Sci. 2022 Oct 24;13:990915. doi: 10.3389/fpls.2022.990915. eCollection 2022.
Septoria tritici blotch (STB) has been ranked the third most important wheat disease in the world, threatening a large area of wheat production. Although major genes play an important role in the protection against infection, the lifespan of their resistance unfortunately is very short in modern wheat production systems. Combinations of quantitative resistance with minor effects, therefore, are believed to have prolonged and more durable resistance to . In this study, new quantitative trait loci (QTLs) were identified that are responsible for seedling-stage resistance and adult-plant stage resistance (APR). More importantly was the characterisation of a previously unidentified QTL that can provide resistance during different stages of plant growth or multi-stage resistance (MSR). At the seedling stage, we discovered a new isolate-specific QTL, QSt.wai.1A.1. At the adult-plant stage, the new QTL QStb.wai.6A.2 provided stable and consistent APR in multiple sites and years, while the QTL QStb.wai.7A.2 was highlighted to have MSR. The stacking of multiple favourable MSR alleles was found to improve resistance to by up to 40%.
小麦叶枯病（STB）已被列为世界上第三大重要的小麦病害，威胁着大面积的小麦生产。尽管主基因在抵御感染方面发挥着重要作用，但不幸的是，在现代小麦生产系统中它们的抗性寿命非常短。因此，人们认为具有微效的数量抗性组合具有更持久的抗性。在本研究中，鉴定出了负责苗期抗性和成株期抗性（APR）的新数量性状位点（QTL）。更重要的是对一个以前未鉴定的QTL进行了表征，该QTL可以在植物生长的不同阶段提供抗性或多阶段抗性（MSR）。在苗期，我们发现了一个新的分离物特异性QTL，即QSt.wai.1A.1。在成株期，新的QTL QStb.wai.6A.2在多个地点和年份提供了稳定一致的APR，而QTL QStb.wai.7A.2被突出显示具有MSR。发现多个有利的MSR等位基因的叠加可将对[病害名称未明确，原文缺失]的抗性提高多达40%。
