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在 Pseudocercospora 中的物种多样性

J Z Groenewald¹, Y Y Chen², Y Zhang³

¹Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands.

Fungal systematics and evolution

|August 13, 2024

概括

这项研究描述了29种新的Pseudocercospora真菌,扩大了这些植物病原体的已知多样性. 遗传学分析澄清了它们的分类学和60个国家的宿主特异性.

科学领域:

菌类学和植物病理学
菌类系统学和进化论
植物与微生物的相互作用

背景情况:

伪虫的物种是广泛传播的植物病原体,在热带和亚热带地区引起叶子和水果斑点.
虽然它具有类似于菌体的性形态,但Pseudocercospora spp. 在Mycosphaerellaceae中形成一个独特的属.
准确的分类学识别对于了解宿主特异性和潜在的农业影响至关重要.

研究的目的:

划分和描述Pseudocercospora属内的新物种.
通过遗传学分析,增强对Pseudocercospora分类学的理解.
为了研究宿主特异性和Pseudocercospora物种的地理分布.

主要方法:

内部转录间隔器 (ITS),actin (actA),翻译延长因子1-alpha (tef1) 和RNA聚合酶II第二大子单元 (rpb2) 基因的多位点DNA测序.
遗传学树的构建,以阐明进化关系.
为稳定命名体系,对已确定的名称进行表型和讲型的指定.

主要成果:

在60个国家的413种宿主物种中发现了29种新的Pseudocercospora物种.
认可了329个物种名称,并确定了69个额外的未命名的基因系.
为现有的Pseudocercospora名称指定四个表型和一个乳型.

结论:

这项研究显著扩大了已知的Pseudocercospora的物种多样性.
遗传学数据为分类Pseudocercospora物种和理解它们的宿主关联提供了一个强大的框架.
这些发现有助于更好地了解植物病原体,包括那些关心检疫的病原体.

关键词:

多基因系系 Mycosphaerellaceae 新种类植物病原体的分类学.

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