Mideros M F, Turissini D A, Guayazán N, Ibarra-Avila H, Danies G, Cárdenas M, Myers K, Tabima J, Goss E M, Bernal A, Lagos L E, Grajales A, Gonzalez L N, Cooke D E L, Fry W E, Grünwald N, Matute D R, Restrepo S
Department of Biological Sciences, Universidad de Los Andes, Bogotá, Colombia.
Biology Department, University of North Carolina, Chapel Hill, USA.
Persoonia. 2018 Dec;41:39-55. doi: 10.3767/persoonia.2018.41.03.
Over the past few years, symptoms akin to late blight disease have been reported on a variety of crop plants in South America. Despite the economic importance of these crops, the causal agents of the diseases belonging to the genus have not been completely characterized. In this study, a new species was described in Colombia from tree tomato (), a semi-domesticated fruit grown in northern South America. Comprehensive phylogenetic, morphological, population genetic analyses, and infection assays to characterize this new species, were conducted. All data support the description of the new species, sp. nov. Phylogenetic analyses suggest that this new species belongs to clade 1c of the genus and is a close relative of the potato late blight pathogen, . Furthermore, it appeared as the sister group of the strains collected from wild (clonal lineage EC-2). Analyses of morphological and physiological characters as well as host specificity showed high support for the differentiation of these species. Based on these results, a complete description of the new species is provided and the species boundaries within clade 1c in northern South America are discussed.
在过去几年里，南美洲多种作物上都报告出现了类似晚疫病的症状。尽管这些作物具有经济重要性，但属于该属的病害致病因子尚未得到全面鉴定。在本研究中，从树番茄（一种生长在南美洲北部的半驯化水果）中鉴定出了哥伦比亚的一个新物种。对该新物种进行了全面的系统发育、形态学、群体遗传学分析以及感染试验。所有数据均支持新物种的描述，即新种。系统发育分析表明，该新物种属于属的1c分支，是马铃薯晚疫病病原菌的近亲。此外，它似乎是从野生采集的菌株（克隆谱系EC - 2）的姐妹群。形态学、生理学特征以及寄主特异性分析为这些物种的区分提供了有力支持。基于这些结果，对新物种进行了完整描述，并讨论了南美洲北部1c分支内的物种界限。
