Crouch J A, Davis W J, Shishkoff N, Castroagudín V L, Martin F, Michelmore R, Thines M
United States Department of Agriculture, Agricultural Research Service (USDA-ARS), Mycology and Nematology Genetic Diversity and Biology Laboratory, Beltsville, MD, USA.
Oak Ridge Institute for Science and Education, ARS Research Participation Program, Oak Ridge Tennessee, USA.
Fungal Syst Evol. 2022 Jun;9:43-86. doi: 10.3114/fuse.2022.09.05. Epub 2022 Apr 8.
Downy mildew pathogens of graminicolous hosts () are members of eight morphologically and phylogenetically distinct genera in the ( ). Graminicolous downy mildews (GDMs) cause severe losses in crops such as maize, millets, sorghum, and sugarcane in many parts of the world, especially in tropical climates. In countries where the most destructive GDMs are not endemic, these organisms are often designated as high-risk foreign pathogens and subject to oversight and quarantine by regulatory officials. Thus, there is a need to reliably and accurately identify the causal organisms. This paper provides an overview of the species causing graminicolous downy mildew diseases, with a description of their impact on agriculture and the environment, along with brief summaries of the nomenclatural and taxonomic issues surrounding these taxa. Key diagnostic characters are summarized, including DNA sequence data for types and/or voucher specimens, morphological features, and new illustrations. New sequence data for 2 and 28S rDNA markers are provided from the type specimens of three species, , , and . Thirty-nine species of graminicolous downy mildews are accepted, and seven previously invalidly published taxa are validated. Fifty-five specimens are formally designated as types, including lectotypification of 10 species, neotypification of three species, and holotype designation for . Crouch JA, Davis WJ, Shishkoff N, Castroagudín VL, Martin F, Michelmore R, Thines M (2022). species causing downy mildew diseases of , including nomenclature revisions and diagnostic resources. : 43-86. doi: 10.3114/fuse.2022.09.05.
禾本科寄主的霜霉病病原菌（）是假霜霉目（）中八个形态和系统发育上不同属的成员。禾本科霜霉病（GDMs）在世界许多地区，特别是热带气候下，会给玉米、小米、高粱和甘蔗等作物造成严重损失。在最具破坏性的GDMs并非本地流行的国家，这些生物通常被指定为高风险外来病原体，并受到监管官员的监督和检疫。因此，需要可靠且准确地鉴定致病生物。本文概述了引起禾本科霜霉病的物种，描述了它们对农业和环境的影响，以及围绕这些分类单元的命名和分类问题的简要总结。总结了关键诊断特征，包括模式和/或凭证标本的DNA序列数据、形态特征和新的图示。提供了来自三种物种（，和）模式标本的2和28S rDNA标记的新序列数据。现已接受39种禾本科霜霉病物种，并确认了7个先前发表无效的分类单元。正式指定了55个标本为模式，包括10个物种的选定模式、3个物种的新模式和的全模式指定。克劳奇JA、戴维斯WJ、希什科夫N、卡斯特罗阿古丁VL、马丁F、米歇尔莫尔R、廷斯M（2022年）。引起禾本科霜霉病的物种，包括命名修订和诊断资源。：43 - 86。doi:10.3114/fuse.2022.09.05 。
