CSIRO Plant Industry, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia, Brisbane, 4067, Australia.
Theor Appl Genet. 2010 Sep;121(5):941-50. doi: 10.1007/s00122-010-1363-0. Epub 2010 Jun 10.
Fusarium head blight (FHB) and crown rot (CR) are two wheat diseases caused by the same Fusarium pathogens. Progress towards CR resistance could benefit from FHB-resistant germplasm if the same genes are involved in resistance to these two different diseases. Two independent studies were conducted to investigate the relationship between host resistances to these two diseases. In the first study 32 genotypes were assessed and no significant correlation between their reactions to FHB and CR was detected. The second study was based on a QTL analysis of a doubled haploid population derived from a variety with resistance to both diseases. Results from this study showed that loci conferring resistance to FHB and CR are located on different chromosomes. Together, these results suggest that, despite a common aetiology, different host genes are involved in the resistance against FHB and CR in wheat. Thus, although it is possible that genes affecting both diseases may exist in other germplasm or under different conditions, separate screening seems to be needed in identifying sources of CR resistance.
镰刀菌顶腐病（FHB）和冠腐病（CR）是由同一镰刀菌病原体引起的两种小麦病害。如果同一基因参与了对这两种不同疾病的抗性，那么对 CR 抗性的研究进展可能会受益于对 FHB 具有抗性的种质资源。两项独立的研究调查了宿主对这两种疾病的抗性之间的关系。在第一项研究中，评估了 32 个基因型，未发现它们对 FHB 和 CR 的反应之间存在显著相关性。第二项研究基于来自对两种疾病均具有抗性的品种的双单倍体群体的 QTL 分析。这项研究的结果表明，赋予 FHB 和 CR 抗性的基因座位于不同的染色体上。综上所述，尽管病因相同，但小麦对 FHB 和 CR 的抗性涉及不同的宿主基因。因此，尽管可能存在影响这两种疾病的基因存在于其他种质资源或在不同条件下，但在确定 CR 抗性来源时，似乎需要单独筛选。
