Molecular phylogeny and taxonomy of the genus Pythium.

@article{Lvesque2004MolecularPA,
  title={Molecular phylogeny and taxonomy of the genus Pythium.},
  author={C. Andr{\'e} L{\'e}vesque and Arthur W.A.M. de Cock},
  journal={Mycological research},
  year={2004},
  volume={108 Pt 12},
  pages={
          1363-83
        }
}
The phylogeny of 116 species and varieties of Pythium was studied using parsimony and phenetic analysis of the ITS region of the nuclear ribosomal DNA. The D1, D2 and D3 regions of the adjacent large subunit nuclear ribosomal DNA of half the Pythium strains were also sequenced and gave a phylogeny congruent with the ITS data. All the 40 presently available ex-type strains were included in this study, as well as 20 sequences of recently described species from GenBank. Species for which no ex… Expand
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Pythium longandrum (F-73.0) was isolated, from soil samples taken in Lille in northern France, and is characterized by its spherical to elongated sporangia, smooth-walled oogonia and hypogynous to monoclinous antheridia bearing long antheridial cells closely applied to theOogonia. Expand
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TLDR
The phylogenetic relationships of 67 iso- lates representing 24 species of Pythium were assessed by sequence alignment of 684 bp of the mitochon- drially-encoded cytochrome oxidase II gene and the evolutionary relationships obtained by analysis of cox II DNA sequence data corresponds well with the genomic location of this mitochondrially encoded gene. Expand
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The character combination of P. megacarpum and the ITS1 sequence of its rDNA, justifies the creation of a new species within the genus Pythium, which is closely related to P. ostracodes. Expand
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Pythium carbonicum (F-72) sp. nov. was found in soil samples taken on the top of a spoil heap in northern France. The morphology of this new species resembles that of a recently described species:Expand
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