A Phylogeny of the Violaceae (Malpighiales) Inferred from Plastid DNA Sequences: Implications for Generic Diversity and Intrafamilial Classification

@inproceedings{Wahlert2014APO,
  title={A Phylogeny of the Violaceae (Malpighiales) Inferred from Plastid DNA Sequences: Implications for Generic Diversity and Intrafamilial Classification},
  author={Gregory A. Wahlert and Thomas Marcussen and Juliana de Paula-Souza and Min Feng and Harvey E. Ballard},
  year={2014}
}
Abstract The Violaceae consist of 1,000–1,100 species of herbs, shrubs, lianas, and trees that are placed in 22 recognized genera. In this study we tested the monophyly of genera with a particular focus on the morphologically heterogeneous Rinorea and Hybanthus, the second and third most species-rich genera in the family, respectively. We also investigated intrafamilial relationships in the Violaceae with taxon sampling which included all described genera and several unnamed generic segregates… Expand
Phylogenetics of African Rinorea (Violaceae): Elucidating Infrageneric Relationships using Plastid and Nuclear DNA Sequences
TLDR
An updated phylogeny of Rinorea is presented with increased sampling of African taxa, using plastid as well as nuclear DNA sequences, and Ancestral state reconstructions refute previous hypotheses about the evolution of morphological characters traditionally used for Rinorea infrageneric classification. Expand
Afrohybanthus (Violaceae), a new genus for a distinctive and widely distributed Old World hybanthoid lineage
TLDR
Broad studies of representative taxa within each clade have revealed coherent suites of macromorphological traits in foliage, flowers, fruits and seeds that easily discriminate the nine hybanthoid lineages from each other and from currently recognized genera in the Violaceae. Expand
Phylogeny of the Rosidae: A dense taxon sampling analysis
TLDR
This study combines sequences from 9300 species, representing 2775 genera, 138 families, and 17 orders into a supermatrix, and shows the value of a botanically informed bioinformatics approach and dense taxonomic sampling for resolving rosid relationships. Expand
Systematic studies in Neotropical Rinorea (Violaceae): Two new sections and a new generic segregate
TLDR
Rinorea, the second most species-rich genus in the Violaceae, has been shown to be polyphyletic with four separate clades recovered in phylogenetic studies, and Bribria, a new genus, is segregated from Rinorea s.str. Expand
Identity of the Calcarata species complex in Viola sect. Melanium (Violaceae)
TLDR
It is hypothesized that the lack of phylogenetic resolution in the Calcarata complex may result mainly from frequent hybridization and hybrid speciation, processes that are well documented for Viola and V. Melanium. Expand
Ixchelia, a new genus of Violaceae from Mexico and Mesoamerica
TLDR
The recognition of Ixchelia as a distinct genus is based on morphological data and molecular phylogenetic evidence, both of which support its monophyly and its significant divergence from related genera. Expand
The complete chloroplast genome sequences of four Viola species (Violaceae) and comparative analyses with its congeneric species
TLDR
The phylogenetic tree, which revealed that Malpighiales is divided into five clades at the family level: Erythroxylaceae, Chrysobalanaceae, Euphorbiaceae, Salicaceae, and Violaceae, revealed that Violaceae was monophyletic, with a bootstrap value of 100% and was divided into two subclades. Expand
From Gene Trees to a Dated Allopolyploid Network: Insights from the Angiosperm Genus Viola (Violaceae)
TLDR
The most parsimonious network topology is identified from a set of five competing scenarios differing in the interpretation of homoeolog extinctions and lineage sorting, based on fewest possible ghost subgenome lineages, least possible deviation from expected ploidy as inferred from available chromosome counts of the involved polyploid taxa. Expand
The Evolution of Violaceae from an Anatomical and Morphological Perspective1
TLDR
Variation in androecium and nectary links the distinctive androECium so common in the Violaceae with more conventional structures found in other taxa of the parietal placentation group of Malpighiales. Expand
No evidence of contemporary interploidy gene flow between the closely related European woodland violets Viola reichenbachiana and V. riviniana (sect. Viola, Violaceae).
TLDR
The results indicate lack of gene flow between species, high influence of selfing on genetic variability, as well as probably only localised introgression toward V. riviniana. Expand
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TLDR
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  • Biology, Medicine
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The present molecular phylogenetic analysis suggests that the convolute, apotact and quincuncial petal aestivation is successively derived within the Violaceae and the evolutionary trends of the other morphological characteristics, such as a filament connation, the number of carpels and floral symmetry, are discussed. Expand
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TLDR
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TLDR
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Relationships among pansies (Viola section Melanium) investigated using ITS and ISSR markers
TLDR
It is confirmed that the so-called pansies form a derived and monophyletic group and the low genetic differentiation and the complex cytological evolution suggest that diversification in Melanium is the result of a reticulate evolution and rapid radiation in Europe and Northern Africa. Expand
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