IMA Fungus 8(1): 153-187, doi: 10.5598/imafungus.2017.08.01.11

Diaporthe is paraphyletic

Lei Cai, Fang Liu^‡, Weijun Duan^§, Pedro W. Crous^|, Lei Cai^¶

‡ Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Mycology, Beijing§ Ningbo Academy of Inspection and Quarantine, Zhejiang| CBS-KNAW Fungal Biodiversity Centre, Utrecht¶ Institute of Microbiology, Chinese Academy of Sciences, No. 10, Key Laboratory of Systematic Mycology & Lichenology, Beijing

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Citation: Cai L, Liu F, Duan W, Crous PW, Cai L (2017) Diaporthe is paraphyletic. IMA Fungus 8(1): 153-187. https://doi.org/10.5598/imafungus.2017.08.01.11

Abstract

Previous studies have shown that our understanding of species diversity within Diaporthe (syn. Phomopsis) is limited. In this study, 49 strains obtained from different countries were subjected to DNA sequence analysis. Based on these results, eight new species names are introduced for lineages represented by multiple strains and distinct morphology. Twelve Phomopsis species previously described from China were subjected to DNA sequence analysis, and confirmed to belong to Diaporthe. The genus Diaporthe is shown to be paraphyletic based on multi-locus (LSU, ITS and TEF1) phylogenetic analysis. Several morphologically distinct genera, namely Mazzantia, Ophiodiaporthe, Pustulomyces, Phaeocytostroma, and Stenocarpella, are embedded within Diaporthe s. lat., indicating divergent morphological evolution. However, splitting Diaporthe into many smaller genera to achieve monophyly is still premature, and further collections and phylogenetic datasets need to be obtained to address this situation.

Keywords

Ascomycota, Diaporthales, Phomopsis, phylogeny, taxonomy