@ARTICLE{TreeBASE2Ref17312,
author = {Catarina Rydin and M. Kllersj and Else Marie Friis},
title = {Seed plant relationships and the systematic position of Gnetales based on nuclear and chloroplast DNA: conflicting data, rooting problems, and the monophyly of conifers.},
year = {2002},
keywords = {seed plants; phylogeny; Gnetales; rbcL; atpB; 18S rDNA; 26S rDNA; monophyletic conifers; character conflict; rooting problems; support},
doi = {10.1086/338321},
url = {},
pmid = {},
journal = {International Journal of Plant Sciences},
volume = {163},
number = {2},
pages = {197?214},
abstract = {We investigated the systematic position of Gnetales and other seed plant groups using molecular data from 119 land plant species. More than 100 new sequences of rbcL, atpB, 26S, and 18S ribosomal DNA were analyzed together with available GenBank sequences. To evaluate thoroughly the phylogenetic information of each gene, the four data sets were analyzed both separately and combined using different character coding. We found no supported conflict between codon positions in the plastid sequences, but we found a more complex pattern, indicating conflict between transitions and transversions, within each position. Including all information, plastid data results in a ?Gnetales basal? phylogeny, whereas nuclear data weakly supports anthophytes. When transitions are excluded, Gnetales associate with conifers. Our study does not answer all questions on seed plant phylogeny, but it does show conifers as monophyletic with high support, rejecting a close relationship between Gnetales and the conifer family Pinaceae. Nuclear and chloroplast data produced essentially identical phylogenies except for the position of the seed plant root, and a sister relationship between Gnetales and angiosperms could not be fully ruled out. These results strongly conflict with previously published analyses of mitochondrial data.}
}
Citation for Study 849
Citation title:
"Seed plant relationships and the systematic position of Gnetales based on nuclear and chloroplast DNA: conflicting data, rooting problems, and the monophyly of conifers.".
This study was previously identified under the legacy study ID S709
(Status: Published).
Citation
Rydin C., Kllersj M., & Friis E. 2002. Seed plant relationships and the systematic position of Gnetales based on nuclear and chloroplast DNA: conflicting data, rooting problems, and the monophyly of conifers. International Journal of Plant Sciences, 163(2): 197?214.
Authors
-
Rydin C.
-
Kllersj M.
-
Friis E.
Abstract
We investigated the systematic position of Gnetales and other seed plant groups using molecular data from 119 land plant species. More than 100 new sequences of rbcL, atpB, 26S, and 18S ribosomal DNA were analyzed together with available GenBank sequences. To evaluate thoroughly the phylogenetic information of each gene, the four data sets were analyzed both separately and combined using different character coding. We found no supported conflict between codon positions in the plastid sequences, but we found a more complex pattern, indicating conflict between transitions and transversions, within each position. Including all information, plastid data results in a ?Gnetales basal? phylogeny, whereas nuclear data weakly supports anthophytes. When transitions are excluded, Gnetales associate with conifers. Our study does not answer all questions on seed plant phylogeny, but it does show conifers as monophyletic with high support, rejecting a close relationship between Gnetales and the conifer family Pinaceae. Nuclear and chloroplast data produced essentially identical phylogenies except for the position of the seed plant root, and a sister relationship between Gnetales and angiosperms could not be fully ruled out. These results strongly conflict with previously published analyses of mitochondrial data.
Keywords
seed plants; phylogeny; Gnetales; rbcL; atpB; 18S rDNA; 26S rDNA; monophyletic conifers; character conflict; rooting problems; support
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S849
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref17312,
author = {Catarina Rydin and M. Kllersj and Else Marie Friis},
title = {Seed plant relationships and the systematic position of Gnetales based on nuclear and chloroplast DNA: conflicting data, rooting problems, and the monophyly of conifers.},
year = {2002},
keywords = {seed plants; phylogeny; Gnetales; rbcL; atpB; 18S rDNA; 26S rDNA; monophyletic conifers; character conflict; rooting problems; support},
doi = {10.1086/338321},
url = {},
pmid = {},
journal = {International Journal of Plant Sciences},
volume = {163},
number = {2},
pages = {197?214},
abstract = {We investigated the systematic position of Gnetales and other seed plant groups using molecular data from 119 land plant species. More than 100 new sequences of rbcL, atpB, 26S, and 18S ribosomal DNA were analyzed together with available GenBank sequences. To evaluate thoroughly the phylogenetic information of each gene, the four data sets were analyzed both separately and combined using different character coding. We found no supported conflict between codon positions in the plastid sequences, but we found a more complex pattern, indicating conflict between transitions and transversions, within each position. Including all information, plastid data results in a ?Gnetales basal? phylogeny, whereas nuclear data weakly supports anthophytes. When transitions are excluded, Gnetales associate with conifers. Our study does not answer all questions on seed plant phylogeny, but it does show conifers as monophyletic with high support, rejecting a close relationship between Gnetales and the conifer family Pinaceae. Nuclear and chloroplast data produced essentially identical phylogenies except for the position of the seed plant root, and a sister relationship between Gnetales and angiosperms could not be fully ruled out. These results strongly conflict with previously published analyses of mitochondrial data.}
}
- Show RIS reference
TY - JOUR
ID - 17312
AU - Rydin,Catarina
AU - Kllersj,M.
AU - Friis,Else Marie
T1 - Seed plant relationships and the systematic position of Gnetales based on nuclear and chloroplast DNA: conflicting data, rooting problems, and the monophyly of conifers.
PY - 2002
KW - seed plants; phylogeny; Gnetales; rbcL; atpB; 18S rDNA; 26S rDNA; monophyletic conifers; character conflict; rooting problems; support
UR - http://dx.doi.org/10.1086/338321
N2 - We investigated the systematic position of Gnetales and other seed plant groups using molecular data from 119 land plant species. More than 100 new sequences of rbcL, atpB, 26S, and 18S ribosomal DNA were analyzed together with available GenBank sequences. To evaluate thoroughly the phylogenetic information of each gene, the four data sets were analyzed both separately and combined using different character coding. We found no supported conflict between codon positions in the plastid sequences, but we found a more complex pattern, indicating conflict between transitions and transversions, within each position. Including all information, plastid data results in a ?Gnetales basal? phylogeny, whereas nuclear data weakly supports anthophytes. When transitions are excluded, Gnetales associate with conifers. Our study does not answer all questions on seed plant phylogeny, but it does show conifers as monophyletic with high support, rejecting a close relationship between Gnetales and the conifer family Pinaceae. Nuclear and chloroplast data produced essentially identical phylogenies except for the position of the seed plant root, and a sister relationship between Gnetales and angiosperms could not be fully ruled out. These results strongly conflict with previously published analyses of mitochondrial data.
L3 - 10.1086/338321
JF - International Journal of Plant Sciences
VL - 163
IS - 2
ER -
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