Investigating the potential for re-emergence of wheat stem rust in a changing climate

研究气候变化中小麦茎锈病重新出现的可能性

• 批准号: 2749452
• 金额: --
• 依托单位: University of East Anglia
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2749452
• 关键词: Investigating; potential; re; emergence; wheat

Wheat stem rust is a notoriously damaging disease of wheat and barley and occurs in most wheat growing areas worldwide. Today, in western Europe the stem rust pathogen, Puccinia graminis f. sp. tritici (Pgt), is experiencing a resurgence after many decades of absence. Pgt is also well suited to warm conditions, and as climate changes this could facilitate the expansion in frequency of stem rust epidemics in regions previously unsuitable for its proliferation. Accordingly, our analysis has shown that over the past 25 years climatic conditions have become increasingly conducive for Pgt growth and infection in the UK. With the number of sporadic incidences of stem rust in western Europe increasing there is a need to understand the diversity of the stem rust pathogen in this region and how future changes in climate may impact the risk of wheat stem rust re-emergence in the UK.The aim of this project is to evaluate the threat of Pgt to UK cereals in a changing climate. To achieve this the project will (i) use our MARPLE (Mobile And Real-time PLant disEase) diagnostics platform to assess the genetic diversity of Pgt aross western Europe, (ii) phenotypically characterise these Pgt isolates to understand their threat to wheat production, (iii) assess the temperature responses of a selection of Pgt isolates during disease development and (iv) use this new knowledge to develop a model to explore the effects of climate change on future disease risk.

小麦茎锈病是一种众所周知的小麦和大麦破坏性病害，发生在全球大多数小麦种植区。如今，在西欧，茎锈病病原体为 Puccinia graminis f. sp。小麦 (Pgt) 在消失了几十年后正在复苏。 Pgt 也非常适合温暖的条件，随着气候变化，这可能会促进以前不适合其扩散的地区茎锈病流行的频率增加。因此，我们的分析表明，过去 25 年中，英国的气候条件越来越有利于 Pgt 的生长和感染。随着西欧茎锈病零星发生率的增加，有必要了解该地区茎锈病病原体的多样性，以及未来气候变化如何影响英国小麦茎锈病重新出现的风险。该项目的目的是评估气候变化下 Pgt 对英国谷物的威胁。为了实现这一目标，该项目将 (i) 使用我们的 MARPLE（移动实时植物病害）诊断平台来评估西欧 Pgt 的遗传多样性，(ii) 对这些 Pgt 分离株进行表型特征分析，以了解它们对小麦生产的威胁， (iii) 评估选定的 Pgt 分离株在疾病发展过程中的温度反应，以及 (iv) 利用这一新知识开发模型来探索气候变化对未来疾病风险的影响。