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The Phylogenetic Relationships Of Lembocarpus And Goyazia (Gesneriaceae) Based On NdhF Sequences, James F. Smith
The Phylogenetic Relationships Of Lembocarpus And Goyazia (Gesneriaceae) Based On NdhF Sequences, James F. Smith
Biology Faculty Publications and Presentations
The phylogenetic relationships of Goyazia and Lembocarpus are investigated based on cladistic analysis of ndhF sequences. Both genera are currently classified in the tribe Gloxinieae, but both are poorly known. Based on its floral morphology, the classification of Goyazia in Gloxinieae is not controversial. Lembocarpus may be placed in Gloxinieae, Episcieae, or Sinningieae. The acaulescent, tuberous nature of Lembocarpus limits the number of characters available for a morphological analysis and has made its classification and phylogenetic relationships difficult to resolve. Phylogenetic analyses of ndhF sequences place both genera in Gloxinieae. Although the affinities within the tribe are ambiguous …
Phylogenetic Resolution Within The Tribe Episcieae (Gesneriaceae): Congruence Of Its And Ndhf Sequences From Parsimony And Maximum-Likelihood Analyses, James F. Smith
James F. Smith
Generic relationships within Episcieae were assessed using ITS and ndhF sequences. Previous analyses of this tribe have focused only on ndhF data and have excluded two genera, Rhoogeton and Oerstedina, which are included in this analysis. Data were analyzed using both parsimony and maximum-likelihood methods. Results from partition homogeneity tests imply that the two data sets are significantly incongruent, but when Rhoogeton is removed from the analysis, the data sets are not significantly different. The combined data sets reveal greater strength of relationships within the tribe with the exception of the position of Rhoogeton. Poorly or unresolved relationships based exclusively …
A Cladistic Analysis Of NdhF Sequences From Representative Species Of Saintpaulia And Streptocarpus Subgenera And Streptocarpella (Gesneriaceae), James F. Smith, M. E. Kresge, M. Möller, Q. C. B. Cronk
A Cladistic Analysis Of NdhF Sequences From Representative Species Of Saintpaulia And Streptocarpus Subgenera And Streptocarpella (Gesneriaceae), James F. Smith, M. E. Kresge, M. Möller, Q. C. B. Cronk
Biology Faculty Publications and Presentations
Two African genera of the Gesneriaceae, Saintpaulia and Streptocarpus, are similar in many respects. Both genera have blue to purple flowers, pollen of similar shape and exine sculpting, embryos with one-celled uninucleate chalazal haustoria, shared vegetative structures among some species, and are among the few genera in the Gesneriaceae which include species with chromosome count of n=15. Similarity of these features has indicated that the two genera are likely to be closely related. This study examines the sequences of the chloroplast gene ndhF among several representative Saintpaulia and representatives of Streptocarpus subgenera Streptocarpella and Streptocarpus. The …