A recircumscription of Begonia based on nuclear ribosomal sequences

@article{Forrest2003ARO,
  title={A recircumscription of Begonia based on nuclear ribosomal sequences},
  author={Laura L. Forrest and Peter M. Hollingsworth},
  journal={Plant Systematics and Evolution},
  year={2003},
  volume={241},
  pages={193-211}
}
Abstract.With c. 1400 known species, Begonia is one of the largest plant genera. In order to address the evolution of Begonia we have produced maximum parsimony and maximum likelihood cladograms for 26S and ITS sequence data. Sequences were obtained from a total of 35 species of Begonia, one species of Symbegonia and two species of Datisca. The resulting phylogenetic hypotheses suggest that the most basal members of Begonia are from Africa, with American and Asian clades nested within the… 
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References

SHOWING 1-10 OF 61 REFERENCES
A phylogenetic investigation of Begonia L. section knesebeckia (Klotzsch) a.dc
TLDR
The molecular phylogeny corroborates the conclusion in the larger morphological study that Knesebeckia is not monophyletic and is shown to be phylogenetically informative, exhibiting little homoplasy.
ITS Sequences and the Phylogeny of the Genus Robinsonia (Asteraceae)
TLDR
ITS sequences provide strong support for the monophyly of Robinsonia, and relative rate tests indicate that the molecular clock cannot be rejected for ITS sequence evolution in Robinsonia.
Phylogenetic studies in Streptocarpus (Gesneriaceae): reconstruction of biogeographic history and distribution patterns
TLDR
The molecular data suggest a southwards migration and "progressive latitudinal speciation" of subgenus Streptocarpus in Africa, consistent with the hypothesis of a land bridge connection between 45-26Mya.
Datiscaceae Revisited: Monophyly and the Sequence of Breeding System Evolution
TLDR
The phylogenetic relationships of Datiscaceae and the sequence of breeding system evolution are reexamined, finding no evidence for a progenitor-derivative relationship for the two species ofDatisca, and results from analysis of rbcL, 18S, and a combined data set all agree thatDatiscaceae do not form a monophyletic assemblage.
Molecular evidence for an African origin of the Hawaiian endemic Hesperomannia (Asteraceae).
TLDR
Phylogenetic comparisons within the Vernonieae using sequences of both ndhF and the internal transcribed spacer regions of nuclear ribosomal DNA reveal that Hesperomannia is sister to African species of Vernonia, suggesting long-distance dispersal northeastward from Africa to southeast Asia and across the many Pacific Ocean island chains is the most likely explanation for this unusual biogeographic connection.
Origin and relationships of Saintpaulia (Gesneriaceae) based on ribosomal DNA internal transcribed spacer (ITS) sequences.
TLDR
The ITS sequence data demonstrate that the unifoliate Streptocarpus species form a clade, and are also characterized by a unique 47-bp deletion in ITS 2, which strongly support the monophyly of Saintpaulia.
Classification, Origin, and Patterns of Diversification of Corynocarpus (Corynocarpaceae) Inferred from DNA Sequences
TLDR
The rbcL results support current placement of Corynocarpus in its own distinct family and suggest that this family is most closely related to the Anisophylleaceae, Begoniaceae, Coriariaceae, Cucurbitaceae, Datiscaceae, and Tetramelaceae, together comprising the order Cucurbitales.
Molecular Phylogenetic Relationships Among Angiosperms: An Overview Based on rbcL and 18S rDNA Sequences
TLDR
18S rDNA sequence analysis confirms the rbcL-based inferences that Droseraceae and Nepenthaceae are closely related to the Caryophyllidae and that a number of members of Rosidae and Dilleniidae have as their closest relatives members of Asteridae.
Phylogenetic affinities of Datiscaceae based on an analysis of nucleotide sequences from the plastid rbcL gene
TLDR
The results do not support the monophyly of Datiscaceae and suggest that a previous separation of the group at the family level may be warranted, but analyses with smaller data sets suggest affinities with higher Hamamelidae, among which are several actinorhizal groups.
Radiation of the endemic genus Dendroseris (Asteraceae) on the Juan Fernandez Islands: evidence from sequences of the its regions of nuclear ribosomal DNA
TLDR
Phylogenetic relationships among nine of the 11 species of the endemic genus Dendroseris on the Juan Fernandez Islands were inferred from nucleotide sequences of the internal transcribed spacer regions (ITS) of the 1 8-26S nuclear ribosomal DNA, supporting the hypothesis of rapid adaptive radiation of DENDroser is on the islands.
...
1
2
3
4
5
...