ABSTRACT Piptoporellus baudonii is proposed as a new combination for Laetiporus baudonii in the Polyporales (Basidiomycota) based on morphological and molecular features. This parasitic macrofungus attacks cashew trees, Eucalyptus, cassava, Tectona, and some indigenous trees in southern regions of Tanzania and poses a serious threat to agroforestry and livelihood conditions in the area. Phylogenetic trees were produced from partial sequences of three rDNA gene regions and a portion of translation elongation factor 1-alpha (TEF1) gene of Laetiporus baudonii for comparisons with samples from the antrodia clade. Our results reveal a strongly supported group of L. baudonii with Piptoporellus in Fomitopsidaceae. Piptoporellus baudonii shares many morphological features with other members of Piptoporellus but differs from them in having broadly ellipsoid or rarely ovoid basidiospores. Both morphological and phylogenetic evidence justify the placement of L. baudonii in Piptoporellus together with the three other known species in the genus.

中文翻译：

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使用多基因数据集对植物病原体 Piptoporellus baudonii 进行系统发育

摘要 Piptoporellus baudonii 是基于形态学和分子特征的多孔孢目（担子菌门）中 Laetiporus baudonii 的新组合。这种寄生的大型真菌会攻击坦桑尼亚南部地区的腰果树、桉树、木薯、Tectona 和一些本土树木，并对该地区的农林业和生计条件构成严重威胁。系统发育树是从三个 rDNA 基因区域的部分序列和 Laetiporus baudonii 的翻译延伸因子 1-α (TEF1) 基因的一部分产生的，用于与来自牛樟芝进化枝的样品进行比较。我们的结果揭示了在 Fomitopsidaceae 中具有 Piptoporellus 的强力支持的 L. baudonii 组。Piptoporellus baudonii 与 Piptoporellus 的其他成员共享许多形态特征，但与它们的不同之处在于具有宽椭圆形或很少卵形的担子孢子。形态学和系统发育证据均证明 L. baudonii 与该属中的其他三个已知物种一起放置在 Piptoporellus 中。