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.

小麦茎锈病是危害小麦和大麦的一种著名病害，在世界上大多数小麦产区都有发生。今天，在西欧，茎锈病病原菌--小麦锈菌(Puccinia graminis f.sp.)小麦(Tritici，PGT)，在消失了几十年后，正在经历一次复兴。PGT也很适合温暖的条件，随着气候变化，这可能有助于在以前不适合其扩散的地区扩大茎锈病流行的频率。因此，我们的分析表明，在过去的25年里，气候条件越来越有利于PGT在英国的生长和感染。随着西欧茎锈病零星发生数量的增加，有必要了解该地区茎锈病病原菌的多样性，以及未来气候变化如何影响小麦茎锈病在英国重新出现的风险。本项目的目的是评估气候变化中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MAPLE(移动和实时植物疾病)诊断平台来评估PGT菌株在西欧的遗传多样性，(Ii)对这些PGT菌株进行表型特征分析，以了解它们对小麦生产的威胁，(Iii)评估一些PGT菌株在疾病发生期间的温度响应，以及(Iv)利用这一新知识开发一个模型，以探索气候变化对未来疾病风险的影响。