Persoonia (2015) 34, 25-39

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 and C.A. Lévesque (2015)
Phytopythium: molecular phylogeny and systematics
Persoonia 34, 25-39
Abstract: 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 and 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.
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Database assignments for author(s): Arthur W.A.M. De Cock, Michael D. Coffey, C. André Lévesque

Research topic(s) for pests/diseases/weeds:
identification/taxonomy

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phytopythium vexans
	Phytopythium helicoides