@ARTICLE{TreeBASE2Ref16568,
author = {Frank N. Martin},
title = {Phylogenetic relationships among some Pythium species inferred fromsequence analysis of the mitochondrially-encoded cytochrome oxidase II gene.},
year = {2000},
keywords = {Oomycota; phylogeny },
doi = {},
url = {http://www.jstor.org/stable/3761428},
pmid = {},
journal = {Mycologia},
volume = {92},
number = {4},
pages = {711--727},
abstract = {The phylogenetic relationships of 67 isolates representing 24 species of Pythium were assessed by sequence alignment of 684 bp of the mitochondrially-encoded cytochrome oxidase II gene. Sequence differences among species ranged from 1.6 to 14.7 substitutions per 100 bases. The species grouped into three major clades that were, in a general sense, reflective of zoosporangial or hyphal swelling morphology. Clade I contained species with globose to spherical zoosporangia or spherical hyphal swellings. Clade II was comprised of four species, only one of which produced zoosporangia (P. ultimum var. sporangiiferum) with the remaining species producing only spherical hyphal swellings. Species with filamentous to lobulate zoosporangia were in clade III. Pythium oligandrum, a species that produces subglobose zoosporangia with interconnecting filamentous parts was intermediate between species with inflated to lobulate filamentous zoosporangia and species that produced spherical to globose zoosporangia (clades I and II). Two species that produced globose zoosporangia (P. pulchrum and P. rostratum) grouped together separately from the other clades, as did P. nunn. The evolutionary relationships among species obtained by analysis of cox II DNA sequence data corresponds well with the genomic location of this mitochondrially encoded gene as well as the location of the nuclear encoded 5S rRNA gene for a subset of species examined. Characteristics such as heterothallism, oogonial ornamentation, mycoparasitism and the presence of linear mitochondrial genomes were polyphyletic. The only species that contained isolates that did not group together were P. ultimum and P. irregulare; possible reasons for this are discussed.}
}
Citation for Study 639
Citation title:
"Phylogenetic relationships among some Pythium species inferred fromsequence analysis of the mitochondrially-encoded cytochrome oxidase II gene.".
This study was previously identified under the legacy study ID S470
(Status: Published).
Citation
Martin F. 2000. Phylogenetic relationships among some Pythium species inferred fromsequence analysis of the mitochondrially-encoded cytochrome oxidase II gene. Mycologia, 92(4): 711-727.
Authors
Abstract
The phylogenetic relationships of 67 isolates representing 24 species of Pythium were assessed by sequence alignment of 684 bp of the mitochondrially-encoded cytochrome oxidase II gene. Sequence differences among species ranged from 1.6 to 14.7 substitutions per 100 bases. The species grouped into three major clades that were, in a general sense, reflective of zoosporangial or hyphal swelling morphology. Clade I contained species with globose to spherical zoosporangia or spherical hyphal swellings. Clade II was comprised of four species, only one of which produced zoosporangia (P. ultimum var. sporangiiferum) with the remaining species producing only spherical hyphal swellings. Species with filamentous to lobulate zoosporangia were in clade III. Pythium oligandrum, a species that produces subglobose zoosporangia with interconnecting filamentous parts was intermediate between species with inflated to lobulate filamentous zoosporangia and species that produced spherical to globose zoosporangia (clades I and II). Two species that produced globose zoosporangia (P. pulchrum and P. rostratum) grouped together separately from the other clades, as did P. nunn. The evolutionary relationships among species obtained by analysis of cox II DNA sequence data corresponds well with the genomic location of this mitochondrially encoded gene as well as the location of the nuclear encoded 5S rRNA gene for a subset of species examined. Characteristics such as heterothallism, oogonial ornamentation, mycoparasitism and the presence of linear mitochondrial genomes were polyphyletic. The only species that contained isolates that did not group together were P. ultimum and P. irregulare; possible reasons for this are discussed.
Keywords
Oomycota; phylogeny
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S639
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@ARTICLE{TreeBASE2Ref16568,
author = {Frank N. Martin},
title = {Phylogenetic relationships among some Pythium species inferred fromsequence analysis of the mitochondrially-encoded cytochrome oxidase II gene.},
year = {2000},
keywords = {Oomycota; phylogeny },
doi = {},
url = {http://www.jstor.org/stable/3761428},
pmid = {},
journal = {Mycologia},
volume = {92},
number = {4},
pages = {711--727},
abstract = {The phylogenetic relationships of 67 isolates representing 24 species of Pythium were assessed by sequence alignment of 684 bp of the mitochondrially-encoded cytochrome oxidase II gene. Sequence differences among species ranged from 1.6 to 14.7 substitutions per 100 bases. The species grouped into three major clades that were, in a general sense, reflective of zoosporangial or hyphal swelling morphology. Clade I contained species with globose to spherical zoosporangia or spherical hyphal swellings. Clade II was comprised of four species, only one of which produced zoosporangia (P. ultimum var. sporangiiferum) with the remaining species producing only spherical hyphal swellings. Species with filamentous to lobulate zoosporangia were in clade III. Pythium oligandrum, a species that produces subglobose zoosporangia with interconnecting filamentous parts was intermediate between species with inflated to lobulate filamentous zoosporangia and species that produced spherical to globose zoosporangia (clades I and II). Two species that produced globose zoosporangia (P. pulchrum and P. rostratum) grouped together separately from the other clades, as did P. nunn. The evolutionary relationships among species obtained by analysis of cox II DNA sequence data corresponds well with the genomic location of this mitochondrially encoded gene as well as the location of the nuclear encoded 5S rRNA gene for a subset of species examined. Characteristics such as heterothallism, oogonial ornamentation, mycoparasitism and the presence of linear mitochondrial genomes were polyphyletic. The only species that contained isolates that did not group together were P. ultimum and P. irregulare; possible reasons for this are discussed.}
}
- Show RIS reference
TY - JOUR
ID - 16568
AU - Martin,Frank N.
T1 - Phylogenetic relationships among some Pythium species inferred fromsequence analysis of the mitochondrially-encoded cytochrome oxidase II gene.
PY - 2000
KW - Oomycota; phylogeny
UR - http://www.jstor.org/stable/3761428
N2 - The phylogenetic relationships of 67 isolates representing 24 species of Pythium were assessed by sequence alignment of 684 bp of the mitochondrially-encoded cytochrome oxidase II gene. Sequence differences among species ranged from 1.6 to 14.7 substitutions per 100 bases. The species grouped into three major clades that were, in a general sense, reflective of zoosporangial or hyphal swelling morphology. Clade I contained species with globose to spherical zoosporangia or spherical hyphal swellings. Clade II was comprised of four species, only one of which produced zoosporangia (P. ultimum var. sporangiiferum) with the remaining species producing only spherical hyphal swellings. Species with filamentous to lobulate zoosporangia were in clade III. Pythium oligandrum, a species that produces subglobose zoosporangia with interconnecting filamentous parts was intermediate between species with inflated to lobulate filamentous zoosporangia and species that produced spherical to globose zoosporangia (clades I and II). Two species that produced globose zoosporangia (P. pulchrum and P. rostratum) grouped together separately from the other clades, as did P. nunn. The evolutionary relationships among species obtained by analysis of cox II DNA sequence data corresponds well with the genomic location of this mitochondrially encoded gene as well as the location of the nuclear encoded 5S rRNA gene for a subset of species examined. Characteristics such as heterothallism, oogonial ornamentation, mycoparasitism and the presence of linear mitochondrial genomes were polyphyletic. The only species that contained isolates that did not group together were P. ultimum and P. irregulare; possible reasons for this are discussed.
L3 -
JF - Mycologia
VL - 92
IS - 4
SP - 711
EP - 727
ER -