Phytopythium: Molecular phylogeny and systematics

A. W.A.M. de Cock, A. M. Lodhi, T. L. Rintoul, K. Bala, G. P. Robideau, Z. Gloria Abad, M. D. Coffey, S. Shahzad, C. A. Lévesque

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107 Scopus citations


The genus Phytopythium (Peronosporales) has been described, but a complete circumscription has not yet been presented. In the present paper we provide molecular-based evidence that members of Pythium clade K as described by Lévesque & de Cock (2004) belong to Phytopythium. Maximum likelihood and Bayesian phylogenetic analysis of the nuclear ribosomal DNA (LSU and SSU) and mitochondrial DNA cytochrome oxidase subunit 1 (COI) as well as statistical analyses of pairwise distances strongly support the status of Phytopythium as a separate phylogenetic entity. Phytopythium is morphologically intermediate between the genera Phytophthora and Pythium. It is unique in having papillate, internally proliferating sporangia and cylindrical or lobate antheridia. The formal transfer of clade K species to Phytopythium and a comparison with morphologically similar species of the genera Pythium and Phytophthora is presented. A new species is described, Phytopythium mirpurense.

Original languageEnglish (US)
Pages (from-to)25-39
Number of pages15
JournalPersoonia: Molecular Phylogeny and Evolution of Fungi
StatePublished - Jun 29 2015

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics


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