Monitoring of Brazilian wheat blast field populations reveals resistance to QoI, DMI, and SDHI fungicides
Monitoring of Brazilian wheat blast field populations reveals resistance to QoI, DMI, and SDHI fungicides
复制标题
对巴西小麦稻瘟病田群体的监测揭示了对 QoI、DMI 和 SDHI 杀菌剂的抗性
DOI：
10.1111/ppa.13470
复制
发表时间：
2021
期刊：
影响因子：
2.7
通讯作者：
Vicentini S
中科院分区：
文献类型：
--
作者：
Vicentini S
小麦稻瘟病是南美洲、东南亚和非洲南部小麦上最重要和最具破坏性的真菌病害之一。该病可使粮食减产高达70%，并可通过综合疾病管理策略得到最好的控制。缺乏持久的寄主抗性和杀菌剂喷雾无效，使疾病管理的困难变得更加复杂。新型琥珀酸脱氢酶抑制剂(SDHI)杀菌剂是近年来用于小麦病害防治的新型杀菌剂。2012年和2018年从不同地理区域采集的小麦稻瘟病菌POTL的田间种群对QOI(斯特比林)和DMI(唑类)杀菌剂都具有抗性。本研究的主要目的是确定这些人群的SDHI基线敏感度。2012年抽样的6个田间种群中有5个检测到中等水平的SDHI抗性，2018年分离的大多数菌株也检测到中等水平的SDHI抗性。没有发现dhB、sdhc和sdhD基因的靶点突变与SDHI抗性水平之间的关联，这表明巴西小麦稻瘟病群体中可能存在一种与靶点突变无关的预先存在的抗性机制。
Wheat blast is one of the most important and devastating fungal diseases of wheat in South America, South‐east Asia, and now in southern Africa. The disease can reduce grain yield by up to 70% and is best controlled using integrated disease management strategies. The difficulty in disease management is compounded by the lack of durable host resistance and the ineffectiveness of fungicide sprays. New succinate dehydrogenase inhibitor (SDHI) fungicides were recently introduced for the management of wheat diseases. Brazilian field populations of the wheat blast pathogenPyricularia oryzae Triticumlineage (PoTl) sampled from different geographical regions in 2012 and 2018 were shown to be resistant to both QoI (strobilurin) and DMI (azole) fungicides. The main objective of the current study was to determine the SDHI baseline sensitivity in these populations. Moderate levels of SDHI resistance were detected in five out of the six field populations sampled in 2012 and in most of the strains isolated in 2018. No association was found between target site mutations in thesdhB,sdhC, andsdhDgenes and the levels of SDHI resistance, indicating that a pre‐existing resistance mechanism not associated with target site mutations is probably present in Brazilian wheat blast populations.
登录
查看更多内容
影响因子：
2.5
作者：
Cruz, Maria Fernanda A.;Prestes, Ariano M.;Scheeren, Pedro L.
通讯作者：
Scheeren, Pedro L.
影响因子：
4.1
作者：
Rehfus, Alexandra;Miessner, Simone;Stammler, Gerd
通讯作者：
Stammler, Gerd
影响因子：
2.7
作者：
Cruz, C. D.;Kiyuna, J.;Valent, B.
通讯作者：
Valent, B.
影响因子：
--
作者：
J. Rocha;Adérico Júnior Badaró Pimentel;Guilherme Ribeiro;Moacil Alves de Souza
通讯作者：
Moacil Alves de Souza
稻瘟病菌在受感染小麦残渣中的腐生生存
影响因子：
1.8
作者：
C. A. Pizolotto;J. Maciel;J. M. Fernandes;W. Boller
通讯作者：
W. Boller