Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 7 of 7
Full-Text Articles in Entire DC Network
The Juncaceae-Cyperaceae Interface: A Combined Plastid Sequence Analysis, Eleanor Jones, David A. Simpson, Trevor R. Hodkinson, Mark W. Chase, John A. N. Parnell
The Juncaceae-Cyperaceae Interface: A Combined Plastid Sequence Analysis, Eleanor Jones, David A. Simpson, Trevor R. Hodkinson, Mark W. Chase, John A. N. Parnell
Aliso: A Journal of Systematic and Floristic Botany
Phylogenetic relationships of Juncaceae and related families of Cyperales were investigated using DNA sequence data from the plastid rps16 intron, trnL intron, and trnL–F intergenic spacer. Results using parsimony analysis of the aligned matrices find Juncaceae and Cyperaceae to be monophyletic families, which form a clade sister to a monophyletic Thurniaceae that includes Prionium (Prioniaceae), all three clades with 100% bootstrap support. Within Juncaceae, the genus Luzula is monophyletic with 100% bootstrap support and sister to the rest of Juncaceae. Further groupings within the family indicate that the genus Juncus may be monophyletic only with the inclusion …
Chromosome Evolution In Cyperales, Eric H. Roalson, Andrew G. Mccubbin, Richard Whitkus
Chromosome Evolution In Cyperales, Eric H. Roalson, Andrew G. Mccubbin, Richard Whitkus
Aliso: A Journal of Systematic and Floristic Botany
Karyotypic evolution is a prominent feature in the diversification of many plants and animals, yet the role that chromosomal changes play in the process of diversification is still debated. At the diploid level, chromosome fission and/or fusion are necessary components of chromosomal structural change associated with diversification. Yet the genomic features required for these events remain unknown. Here we present an overview of what is known about genomic structure in Cyperales, with particular focus on the current level of understanding of chromosome number and genome size and their impact in a phylogenetic context. We outline ongoing projects exploring genomic structure …
Phylogeny Of Cyperaceae Based On Dna Sequence Data–A New Rbcl Analysis, David A. Simpson, A. Muthama Muasya, Marccus V. Alves, Jeremy J. Bruhl, Sandra Dhooge, Mark W. Chase, Carol A. Furness, Kioumars Ghamkhar, Paul Goetghebeur, Trevor R. Hodkinson, Adam D. Marchant, Anton A. Reznicek, Roland Nieuwborg, Eric H. Roalson, Erik Smets, Julian R. Starr, William W. Thomas, Karen L. Wilson, Xiufu Zhang
Phylogeny Of Cyperaceae Based On Dna Sequence Data–A New Rbcl Analysis, David A. Simpson, A. Muthama Muasya, Marccus V. Alves, Jeremy J. Bruhl, Sandra Dhooge, Mark W. Chase, Carol A. Furness, Kioumars Ghamkhar, Paul Goetghebeur, Trevor R. Hodkinson, Adam D. Marchant, Anton A. Reznicek, Roland Nieuwborg, Eric H. Roalson, Erik Smets, Julian R. Starr, William W. Thomas, Karen L. Wilson, Xiufu Zhang
Aliso: A Journal of Systematic and Floristic Botany
Since the Monocots II meeting in 1998, significant new data have been published that enhance our systematic knowledge of Cyperaceae. Phylogenetic studies in the family have also progressed steadily. For this study, a parsimony analysis was carried out using all rbcL sequences currently available for Cyperaceae, including data for two new genera. One of the four subfamilies (Caricoideae) and seven of the 14 tribes (Bisboeckelereae, Cariceae, Cryptangieae, Dulichieae, Eleocharideae, Sclerieae, Trilepideae) are monophyletic. Subfamily Mapanioideae and tribe Chrysitricheae are monophyletic if, as the evidence suggests, Hellmuthia is considered a member of Cypereae. Some other features of our analysis include: …
Phylogenetic Implications Of A Unique 5.8s Nrdna Insertion In Cyperaceae, Julian R. Starr, Geneviève Gravel, Anne Bruneau, A. Muthama Muasya
Phylogenetic Implications Of A Unique 5.8s Nrdna Insertion In Cyperaceae, Julian R. Starr, Geneviève Gravel, Anne Bruneau, A. Muthama Muasya
Aliso: A Journal of Systematic and Floristic Botany
The purpose of this study was to assess the phylogenetic utility of a large insertion (3 bp) in the 5.8S gene of nuclear ribosomal DNA (nrDNA) in Cyperaceae and selected Juncaceae. This was done by reconstructing the character evolution of the insertion on a phylogeny derived from rbcL sequences. Results suggest that the insertion was gained once at the base of Cyperaceae followed by multiple losses in its most-derived taxa. Despite several homoplastic losses (CI = 0.20), the pattern of insertion loss (RI = 0.88), and base pair variation within the insertion were useful for defining sedge clades at …
Phylogeny Of Abildgaardieae (Cyperaceae) Inferred From Its And Trnl–F Data, Kioumars Ghamkhar, Adam D. Marchant, Karen L. Wilson, Jeremy J. Bruhl
Phylogeny Of Abildgaardieae (Cyperaceae) Inferred From Its And Trnl–F Data, Kioumars Ghamkhar, Adam D. Marchant, Karen L. Wilson, Jeremy J. Bruhl
Aliso: A Journal of Systematic and Floristic Botany
Within the tribe Abildgaardieae, the relationships between Fimbristylis and its relatives have not been certain, and the limits of Fimbristylis have been unclear, with Bulbostylis and Abildgaardia variously combined with it and each other. The relationships and limits of tribes Abildgaardieae and Arthrostylideae and their genera were evaluated across 49 representative species using parsimony and maximum likelihood analyses of ITS (nuclear ribosomal) and trnL–F (plastid) DNA sequence data separately and combined. The evolutionary reconstructions derived from sequences of cpDNA and nrDNA disagree about the position of tribe Arthrostylideae relative to Abildgaardieae; Arthrostylis and Actinoschoenus are either nested within Abildgaardieae …
Phylogenetic Relationships In Tribe Cariceae (Cyperaceae) Based On Nested Analyses Of Four Molecular Data Sets, Marcia J. Waterway, Julian R. Starr
Phylogenetic Relationships In Tribe Cariceae (Cyperaceae) Based On Nested Analyses Of Four Molecular Data Sets, Marcia J. Waterway, Julian R. Starr
Aliso: A Journal of Systematic and Floristic Botany
Phylogenetic reconstruction for Carex and relatives in tribe Cariceae is complicated by species richness and nearly cosmopolitan distribution. In this investigation, our main objective was to estimate evolutionary relationships in tribe Cariceae using DNA sequence data from two spacer regions in nuclear ribosomal genes (ITS and ETS-1f) combined with noncoding chloroplast DNA (trnL intron, trnL–trnF intergenic spacer, and trnE–trnD intergenic spacers). Parsimony analyses of separate and combined data and Bayesian analysis of the combined data matrix revealed strong support for monophyly of tribe Cariceae and for monophyly of two major lineages, one …
Towards A Comprehensive Survey Of C3 And C4 Photosynthetic Pathways In Cyperaceae, Jeremy J. Bruhl, Karen L. Wilson
Towards A Comprehensive Survey Of C3 And C4 Photosynthetic Pathways In Cyperaceae, Jeremy J. Bruhl, Karen L. Wilson
Aliso: A Journal of Systematic and Floristic Botany
Members of the family Cyperaceae were surveyed by original observation and from the literature to assess the distribution of C3 and C4 photosynthetic pathways in the family. All 107 genera were included in the current sample, with 91 genera assessed as consistently C3 and 11 genera as C4. The genera Abildgaardia, Cyperus, Eleocharis, Fimbristylis, and Rhynchospora are variable for this trait. Of the total number (1474) of specific (1406) and infraspecific (68) taxa sampled, 938 taxa (63%) are C3, 527 taxa (36%) are C4, and nine species …