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一种类似于Scytalidium的室内真菌,揭示了Scytalidium的多种关系和融合进化

De-Wei Li¹, Ethan Paine¹, Neil P Schultes²

¹The Connecticut Agricultural Experiment Station Valley Laboratory, 153 Cook Hill Road, Windsor, CT, 06095, USA.

|January 16, 2026

概括

这项研究揭示了室内类似Scytalidium的真菌是多种类型的,挑战了以前的分类. 遗传学分析表明,共同的特征是融合进化的结果,而不是密切的关系.

科学领域:

菌类学菌类学是指菌类学.
分子系统学分子系统学
菌类分类法菌类分类法菌类分类法

背景情况:

类似于scytalidium的真菌通常在室内环境中发现.
以前的分类假定Scytalidium物种之间存在单关系.
形态相似之处可能不反映真正的家族遗传关系.

研究的目的:

为了确定从尘埃中分离出来的室内Scytalidium类真菌的遗传位置.
重新评估Scytalidium属及其相关物种的分类学地位.
调查Scytalidium内部的进化历史和潜在的融合进化.

主要方法:

从室内灰尘中分离和培养一种类似于Scytalidium的真菌.
多个基因组区域的DNA测序:5.8S核核糖体DNA (ITS),核核糖体大子单元 (LSU),翻译延长因子1-α (tef1),β-tubulin (tub2) 和DNA导向RNA聚合酶II第二大子单元 (rpb2).
用序列数据推断进化关系的类遗传学分析.

主要成果:

这种室内真菌在遗传学上与Scytalidium flavobrunneum相近,但与Scytalidium lignicola不同.
遗传学分析表明,Scytalidium物种是多种类的,分布在八个类别和四个类别的真菌中.
这种室内真菌被确定为属于Amphisphaeriales序列中的Monochaetia属,具有二形形态的异形体.
描述了三种新的物种:Scytalidium ruthenicum,Mononachaetia domiciliana和Monochaetia arboricola. 这三种新物种被描述为:Scytalidium ruthenicum,Mononachaetia domiciliana和Monochaetia arboricola. 这三种新物种被描述为:

结论:

斯基塔利迪 (Scytalidium) 属是多种类的,这表明需要进行分类学修订.
在Scytalidium类真菌中共享的形态特征很可能是由于融合进化的.
该研究将Scytalidium物种重新分类到各自的遗传学顺序中,澄清了它们的进化位置.

关键词:

无性真菌是一种无性真菌.共同进化的共同进化这些是hyphomycetes.人类的家谱 (Phylogeny) 是一个学科.

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