@ARTICLE{TreeBASE2Ref15066, author = {D. E. L. Cooke and Andre Drenth and James M. Duncan and Gabrielle Wagels and Clive M. Brasier}, title = {A molecular phylogeny of Phytophthora and related Oomycetes.}, year = {2000}, keywords = {evolution; rDNA; internal transcribed spacers; ITS; Pythium; Peronospora}, doi = {10.1006/fgbi.2000.1202}, url = {}, pmid = {10955905 }, journal = {Fungal Genetics and Biology}, volume = {30}, number = {1}, pages = {17--32}, abstract = {Phylogenetic relationships among 50 Phytophthora species and between Phytophthora and other oomycetes, were examined on the basis of the ITS sequences of genomic rDNA. Phytophthora grouped with Pythium, Peronospora, and Halophytophthora, distant from genera in the Saprolegniales. Albugo was intermediate between these two groups. Unlike Pythium, Phytophthora was essentially monophyletic, all but three species forming a cluster of eight clades. Two clades contained only species with non-papillate sporangia. The other six clades included either papillate and semi-papillate, or semi-papillate and non-papillate types, transcending traditional morphological groupings, which are evidently not natural assemblages. Peronospora was related to P. megakarya and P. palmivora and appears to be derived from a Phytophthora that has both lost the ability to produce zoospores and become an obligate biotroph. Three other Phytophthoras located some distance from the main Phytophthora-Peronospora cluster and probably represent one or more additional genera.} }

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