Phylogenetic relationships and infrageneric classification of Astragalus tragacantha L. (Fabaceae), inferred from nuclear ribosomal DNA Internal transcribed spacers data (nrDNA ITS)

2010 ◽  
Vol 36 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Laurent Hardion ◽  
Alex Baumel ◽  
Pierre-Jean Dumas ◽  
Nathalie Duong ◽  
Laurence Affre ◽  
...  
Keyword(s):  
Ribosomal Dna ◽  
Phylogenetic Relationships ◽  
Internal Transcribed Spacers ◽  
Nuclear Ribosomal Dna ◽  
Nrdna Its ◽  
Infrageneric Classification

Towards a new classification of tribe Stachydeae (Lamiaceae): naming clades using molecular evidence

2019 ◽  
Vol 190 (4) ◽  
pp. 345-358 ◽  
Author(s):  
Yasaman Salmaki ◽  
Günther Heubl ◽  
Maximilian Weigend
Keyword(s):  
Ribosomal Dna ◽  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Nuclear Ribosomal Dna ◽  
Molecular Evidence ◽  
New Classification ◽  
Formal Classification ◽  
Phylogenetic Nomenclature

AbstractStachydeae, comprising c. 470 species, are one of the most diverse and taxonomically puzzling groups in Lamioideae. In the present study, the phylogenetic relationships in the Eurystachys clade (a phylogenetic name for all genera attributed to Stachydeae except Melittis) were reconstructed utilizing nuclear ribosomal DNA sequences (nrETS, 5S-NTS) from 148 accessions in 12 genera. Our phylogenetic results recovered Stachys as paraphyletic with numerous traditionally recognized genera nested in it. A broadly defined Eurystachys clade, however, was monophyletic. Unlike previous studies, the present study was able to resolve the group into 12 well-supported clades, named here as (1) Eriostomum, (2) Stachys, (3) Prasium, (4) Setifolia, (5) Distantes, (6) Burgsdorfia, (7) Hesiodia, (8) Empedoclia, (9) Sideritis, (10) Marrubiastrum, (11) Swainsoniana and (12) Olisia. These 12 clades were formally named in a phylogenetic nomenclature for the Eurystachys clade. Several infrageneric units were retrieved as monophyletic, namely Sideritis sections Burgsdorfia, Empedoclia and Hesiodia, Sideritis subgenus Marrubiastrum and Stachys sections Eriostomum (including Stachys section Mucronata) and Setifolia. The findings of this study also provide the basis for a future formal classification, with two options: (1) splitting of the Eurystachys clade into 12 monophyletic genera, all of them based on pre-existing genus names and redefined to encompass additional taxa, but without clear morphological apomorphies; or (2) lumping of all segregates into a broadly defined Stachys, including widely recognized and well-defined segregates such as Prasium and Sideritis.

Phylogeny, major clades and infrageneric classification of Corymbia (Myrtaceae), based on nuclear ribosomal DNA and morphology

2009 ◽  
Vol 22 (5) ◽  
pp. 384 ◽  
Author(s):  
Carlos Parra-O. ◽  
Michael J. Bayly ◽  
Andrew Drinnan ◽  
Frank Udovicic ◽  
Pauline Ladiges
Keyword(s):  
Ribosomal Dna ◽  
Convergent Evolution ◽  
Morphological Characters ◽  
Molecular Data ◽  
Nuclear Ribosomal Dna ◽  
Molecular Evidence ◽  
Nuclear Rdna ◽  
Infrageneric Classification ◽  
Taxonomic Categories

Phylogenetic relationships of sections and species within Corymbia (Myrtaceae), the bloodwood eucalypts, were evaluated by using combined analyses of nuclear rDNA (ETS + ITS) and morphological characters. Combining morphological characters with molecular data provided resolution of relationships within Corymbia. The analyses supported the monophyly of the genus and recognition of the following two major clades, treated here as new subgenera: subgenus Corymbia, including informal sections recognised by Hill and Johnson (1995), namely Rufaria (red bloodwoods), Apteria and Fundoria; and subgenus Blakella, including sections Politaria (spotted gums), Cadagaria, Blakearia (paper-fruited bloodwoods or ghost gums) and Ochraria (yellow bloodwoods). Hill and Johnson’s section Rufaria is monophyletic if Apteria and Fundoria are included. It is evident that, among the red bloodwoods, series are not monophyletic and several morphological characters result from convergent evolution. There was strong morphological and molecular evidence that the three species of red bloodwoods that occur in south-western Western Australia (series Gummiferae: C. calophylla and C. haematoxylon, and series Ficifoliae: C. ficifolia) form a monophyletic group, separate from the eastern C. gummifera (series Gummiferae), which is probably sister to the clade of all other red bloodwoods. Phylogenetic results supported recognition of new taxonomic categories within Corymbia, and these are formalised here.

Corrigendum to: Phylogeny, major clades and infrageneric classification of Corymbia (Myrtaceae), based on nuclear ribosomal DNA and morphology

2010 ◽  
Vol 23 (2) ◽  
Author(s):  
Carlos Parra-O. ◽  
Michael J. Bayly ◽  
Andrew Drinnan ◽  
Frank Udovicic ◽  
Pauline Ladiges
Keyword(s):  
Ribosomal Dna ◽  
Convergent Evolution ◽  
Morphological Characters ◽  
Molecular Data ◽  
Nuclear Ribosomal Dna ◽  
Molecular Evidence ◽  
Nuclear Rdna ◽  
Infrageneric Classification ◽  
Taxonomic Categories

Phylogenetic relationships of sections and species within Corymbia (Myrtaceae), the bloodwood eucalypts, were evaluated by using combined analyses of nuclear rDNA (ETS + ITS) and morphological characters. Combining morphological characters with molecular data provided resolution of relationships within Corymbia. The analyses supported the monophyly of the genus and recognition of the following two major clades, treated here as new subgenera: subgenus Corymbia, including informal sections recognised by Hill and Johnson (1995), namely Rufaria (red bloodwoods), Apteria and Fundoria; and subgenus Blakella, including sections Politaria (spotted gums), Cadagaria, Blakearia (paper-fruited bloodwoods or ghost gums) and Ochraria (yellow bloodwoods). Hill and Johnson's section Rufaria is monophyletic if Apteria and Fundoria are included. It is evident that, among the red bloodwoods, series are not monophyletic and several morphological characters result from convergent evolution. There was strong morphological and molecular evidence that the three species of red bloodwoods that occur in south-western Western Australia (series Gummiferae: C. calophylla and C. haematoxylon, and series Ficifoliae: C. ficifolia) form a monophyletic group, separate from the eastern C. gummifera (series Gummiferae), which is probably sister to the clade of all other red bloodwoods. Phylogenetic results supported recognition of new taxonomic categories within Corymbia, and these are formalised here.

A new infrageneric classification for Amorimia (Malpighiaceae) based on morphological, phytochemical and molecular evidence

Phytotaxa ◽  
2017 ◽  
Vol 313 (3) ◽  
pp. 231 ◽  
Author(s):  
RAFAEL FELIPE DE ALMEIDA ◽  
ANDRÉ MÁRCIO AMORIM ◽  
ANGELA MARIA DA SILVA CORRÊA ◽  
CÁSSIO VAN DEN BERG
Keyword(s):  
Ribosomal Dna ◽  
Bayesian Methods ◽  
Phylogenetic Relationships ◽  
Plastid Dna ◽  
Nuclear Ribosomal Dna ◽  
Molecular Evidence ◽  
Infrageneric Classification

Phylogenetic relationships for 14 of the 15 species of Amorimia (Malpighiaceae) were inferred based on ndhF plastid DNA and ETS nuclear ribosomal DNA using both parsimony and Bayesian methods. Our results show that: (1) the monophyly of the genus is corroborated with the new circumscription of the A. rigida complex; (2) several morphological and phytochemical characters support Amorimia and its two main clades; and (3) these clades can be proposed as new subgenera in Amorimia.

Phylogenetic analyses of New Caledonian Metrosideros and Carpolepis (Myrtaceae) from nrDNA (ITS) sequences

2000 ◽  
Vol 13 (6) ◽  
pp. 919 ◽  
Author(s):  
Shane D. Wright ◽  
D. Jeannette Keeling ◽  
Fern G. Ashton ◽  
John W. Dawson ◽  
Richard C. Gardner
Keyword(s):  
Ribosomal Dna ◽  
Phylogenetic Relationships ◽  
Sequence Variation ◽  
New Caledonia ◽  
Phylogenetic Analyses ◽  
Nuclear Ribosomal Dna ◽  
Nrdna Its ◽  
Large Measure ◽  
Dna Analyses ◽  
Morphological Taxonomy

We have analysed the phylogenetic relationships of all known species in the genera Metrosideros and Carpolepis (Myrtaceae) from New Caledonia. Variation in nucleotide characters from the internally transcribed spacers of nuclear ribosomal DNA was used to construct parsimony and neighbour-joining phylogenies. These show that there is a large measure of congruence between the existing morphological taxonomy for those species and the relationships inferred from analyses of sequence variation. However, the DNA analyses suggest that Carpolepis may have only equal ranking to the infrageneric Metrosideros clades. The DNA analyses also nest M. tetrasticha among the species of subg. Metrosideros, as opposed to its present classification as a monotypic section (Neocaledonica) within subg. Mearnsia. On the basis of these findings, and of the observed differentiation shown in the analyses between the sectional clades Calyptropetala and Mearnsia of subg. Mearnsia, equivalent rankings may be appropriate for four infrageneric clades in Metrosideros. These four are currently classified as the genus Carpolepis (three species), and subg. Metrosideros (seven species), subg. Mearnsia sect. Mearnsia (five species) and subg. Mearnsia sect. Calyptropetala (five species) within Metrosideros.

Phylogenetic relationships of three tribes of cloacinine nematodes (Strongylida: Chabertiidae) from macropodid marsupials

2018 ◽  
Vol 93 (04) ◽  
pp. 486-493 ◽  
Author(s):  
N.B. Chilton ◽  
F. Huby-Chilton ◽  
A. Koehler ◽  
R.B. Gasser ◽  
I. Beveridge
Keyword(s):  
Ribosomal Dna ◽  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Internal Transcribed Spacers ◽  
Nuclear Ribosomal Dna ◽  
Host Genus ◽  
Single Host

AbstractThe phylogenetic relationships of 42 species of cloacinine nematodes belonging to three tribes (Coronostrongylinea, Macropostrongylinea and Zoniolaiminea) were examined based on sequence data of the first and second internal transcribed spacers (ITS-1 and ITS-2) of the nuclear ribosomal DNA. All nematodes examined are parasites of Australian macropodid marsupials. None of the three nematode tribes was monophyletic. Paraphyly was also encountered in three genera: Papillostrongylus, Monilonema and Wallabinema. Species within the genus Thallostonema were limited to a single host genus (i.e. Thylogale), whereas species within the five principal genera (Coronostrongylus, Macropostrongylus, Popovastrongylus, Wallabinema and Zoniolaimus) were found to occur in multiple host genera. Potential modes of evolution among these nematodes are discussed.

Phylogenetic relationships in Dermocybe and related Cortinarius taxa based on nuclear ribosomal DNA internal transcribed spacers

1997 ◽  
Vol 75 (4) ◽  
pp. 519-532 ◽  
Author(s):  
Y. J. Liu ◽  
S. O. Rogers ◽  
Y. J. Liu ◽  
J. F. Ammirati
Keyword(s):  
Ribosomal Dna ◽  
Phylogenetic Relationships ◽  
Phylogenetic Trees ◽  
Sequence Data ◽  
Molecular Data ◽  
Internal Transcribed Spacers ◽  
Nuclear Ribosomal Dna ◽  
Herbarium Specimens ◽  
Data Reorganization ◽  
Taxonomic Groups

The genus Cortinarius Fr. (Cortinariaceae, Agaricales) is divided into four or more subgenera. Dermocybe (Fr.) Sacc. has been recognized as either a subgenus of Cortinarius or a separate genus, distinguished in part by the presence of various anthraquinonic pigments. Nucleotide sequences of ribosomal DNA 5.8S and internal transcribed spacers were used to investigate the phylogenetic relationships among species of Dermocybe and selected taxa from subgenera of Cortinarius. Sequence data from 47 herbarium specimens representing 31 taxa (28 species plus 3 varieties) of Dermocybe and Cortinarius were analyzed using parsimony, maximum likelihood, and neighbor joining. In general, molecular data support the morphological groupings of the taxa, although they more closely correspond to biochemical (anthraquinone and other) analyses. Phylogenetic trees showed that, while the sections Dermocybe and Malicoriae are monophyletic, and the concolorous or almost concolorous red species (section Sanguineae, such as D. sanguinea and relatives) together formed a coherent clade, the subgenus Dermocybe sensu lato itself is polyphyletic. Cortinarius californicus clusters with taxa in Cortinarius, subgenus Telamonia, section Armillati. Dermocybe olivaceopicta is more closely related to other subgenera of Cortinarius than to Dermocybe. Within the genus Cortinarius, certain of the subgenera may actually represent coherent genera. Of the subgenera examined, Telamonia, Phlegmacium, and possibly Sericeocybe appear to represent well defined taxonomic groupings. However, current assignments of taxa within Leprocybe and Myxacium were inconsistent with the molecular data. Reorganization of some taxa and taxonomic groups is suggested. Key words: Dermocybe, Cortinarius, molecular phylogeny, rDNA, ITS1, ITS2.

Sign in / Sign up

Export Citation Format

Share Document