A5001473009- Plant Taxonomy and Phylogenetics
- Botany, Ecology, and Taxonomy Studies
- Sesquiterpenes and Asteraceae Studies
- Plant Diversity and Evolution
- Botanical Research and Chemistry
- Plant Toxicity and Pharmacological Properties
- Botany and Plant Ecology Studies
- Genetic diversity and population structure
- Plant and animal studies
- Plant and Fungal Species Descriptions
- Chromosomal and Genetic Variations
- Natural product bioactivities and synthesis
- Turfgrass Adaptation and Management
- Ethnobotanical and Medicinal Plants Studies
- Botanical Studies and Applications
- Lichen and fungal ecology
- Genomics and Phylogenetic Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant and fungal interactions
- Plant Pathogens and Fungal Diseases
- Plant Ecology and Taxonomy Studies
- Biochemical and Structural Characterization
- Phytochemistry and Biological Activities
- Garlic and Onion Studies
- Plant responses to water stress
University of Memphis
2009-2025
Australian National Herbarium
1998-2009
Centre for Australian National Biodiversity Research
1998-2009
Commonwealth Scientific and Industrial Research Organisation
1998-2009
Plant Industry
1998-2009
ACT Government
2005-2007
Systematic (Netherlands)
2004
Australian National University
2000
University of Alberta
1989-1999
Harvard University
1991
Angiosperms are the cornerstone of most terrestrial ecosystems and human livelihoods
The breeding of new, high‐quality citrus cultivars depends on dependable information about the relationships taxa within tribe Citreae; therefore, it is important to have a well‐supported phylogeny between species not only advance strategies, but also conservation strategies for wild taxa. recent history systematics Citrus (Rutaceae: Aurantioideae) and its allies, in context Rutaceae taxonomy as whole, reviewed. most classification tested using nine cpDNA sequence regions representatives all...
Internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA from 44 taxa the genus Lupinus and five outgroup were used for phylogenetic analysis. appears as a strongly supported monophyletic genus, which is unambiguously part Genisteae. The lupines are distributed into main clades in general accordance with their geographical origin. In Old World, almost all recognized taxonomic units well resolved. ITS data reveal an unexpectedly close relationship between diverse sections...
Asteraceae are the largest family of dicotyledonous plants and have long been known for their taxonomie complexity.The ubiquitous parallelisms in morphology within made phylogenetic reconstruction tribal circumscription an area debate.In this study we explored utility using two relatively short non-coding chloroplast DNA sequences, trnL intron IrnUtrnV intergenic spacer, to resolve relationships among tribes.The results analysis produced trees that topologically congruent with prior...
The Gnaphalieae are a group of sunflowers that have their greatest diversity in South America, Southern Africa, and Australia. objective this study was to reconstruct phylogeny the Australian using sequence data from trnL intron, trnL/trnF intergenic spacer, matK, ETS. Included investigation genera subtribes Cassiniinae, Gnaphaliinae, Angianthinae, Loricariinae, one four all tribes subfamily Asteroideae serve as outgroups. Results indicate An- gianthinae Cassiniinae non-monophyletic...
Abstract Comprising more than 25 000 species, the Sunflower Family (Compositae or Asteraceae) is largest family of flowering plants. Many its lineages have experienced recent and rapid radiations, has a deep widespread history large‐scale gene duplications polyploidy. most important evolutionary questions about family's diversity remain unanswered due to poor resolution lack support for major nodes phylogeny. Our group employed phylogenomics approach using Hyb‐Seq that includes sequencing...
Abstract The classification of the family Compositae (Asteraceae) has been much improved in last decades by application molecular methods culminating recompilation published 2009, Systematics, evolution, and biogeography . Additional evidence relationships come from use high‐throughput sequencing methods. Our late colleague Vicki Ann Funk (1947–2019) was a pioneer this line research. Together with her team, she contributed to achievement mature family, which left outlined. In paper, we...
The tribe Acacieae (Fabaceae: Mimosoideae) contains two genera, the monotypic African Faidherbia and pantropical Acacia, which comprise about 1200 species with over 950 confined to Australia. As currently recognized, genus Acacia is subdivided into three subgenera: subg. Aculeiferum, predominantly Australian Phyllodineae. Morphological studies have suggested are artificial a close affinity Ingeae. Based on available data there no consensus whether should be subdivided. Sequence analysis of...
Hemlock, Tsuga (Pinaceae), has a disjunct distribution in North America and Asia. To examine the biogeographic history of , phylogenetic relationships among multiple accessions all nine species were inferred using chloroplast DNA sequences cloned nuclear ribosomal ITS region. Analysis resolve clade that includes two western American species, T. heterophylla mertensiana, Asian within which one eastern caroliniana is nested. The other canadensis sister to clade. chinensis from Taiwan did not...
A phylogenetic analysis of exemplars Acacieae, Ingeae, and some Mimoseae, based on trnK, matK, psbA-trnH, trnL/trnF sequence data, is presented. The results support other recent studies in showing that neither the Ingeae nor Acacieae monophyletic. Some subgenera Acacia, specifically Acacia Phyllodineae, are monophyletic, but subg. a basal polychotomy with various members Mimoseae large clade Acacieae. Phyllodineae sister group to Ingeae. Both Aculeiferum paraphyletic.
Abstract The Helichrysum‐Anaphalis‐Pseudognaphalium (HAP) clade is a major component of the tribe Gnaphalieae (Compositae) and includes genera Helichrysum, Anaphalis, Achyrocline Pseudognaphalium . Allopolyploid origins for at least two clades within HAP have previously been suggested, one involving genus Anaphalis Mediterranean‐Asian Helichrysum species, second part In present paper, with use nuclear ribosomal plastid DNA markers an extensive sampling clade, further evidence relevant to...
The internal transcribed spacer (ITS) region of nuclear ribosomal DNA from 22 diploid and tetraploid annual Bromus species section (Poaceae) three belonging to other sections, catharticus (section Ceratochloa), anomalus Pnigma), sterilis Genea), were investigated by PCR amplification direct sequencing. length the ITS-1 varied 215 218 bp, that ITS-2 216 in analyzed. was more variable provided informative sites (49) than (32). No variation encountered within species. In pairwise comparison...
Previous taxonomic treatments of the family Zosteraceae in Australia/New Zealand have recognized Heter- ozostera tasmanica (monotypic) and four Zostera species all belonging to subgenus Zosterella: Z. capricorni, muelleri, mucronata, novazelandica. has always been taxonomically problematic Australia, where researchers expressed difficulty with recognition due vague or inconsistent morphological characters. There also a lack agreement on generic (notably distinctness Heterozostera) subgeneric...
The affinities as well the circumscription of Orthotrichaceae (Bryopsida), one most diverse families mosses, have been focus a controversy for much last century. We obtained rbcL sequences 37 arthrodontous including 27 taxa Orthotrichales. were analyzed using maximum parsimony and neighbor joining in order to (1) test monophyly Orthotrichales Orthotrichaceae; (2) determine their phylogenetic relationships; (3) current subfamilial classification within Orthotrichaceae. Both analyses suggest...
Colonization and diversification processes are responsible for the distinctiveness of island biotas, with Madagascar standing out as abiodiversity hotspot exceptionally rich in species endemism. Regardless its significance, evolutionary history drivers Madagascar's flora remain understudied. Here we focus on Helichrysum (Compositae, Gnaphalieae) to investigate biogeographic origins Malagasy flora. We inferred a highly resolved phylogeny based target-enrichment data from 327 (including 51 %...
Wide speculation surrounds the origin and phylogenetic relationships of most highly reduced sections in genus Carex. In order to gain a better understanding phylogeny Carex, relationship sect. Phyllostachys 12 putatively related sections, representing all four subgenera ( Primocarex, Indocarex, Vignea ), was inferred from sequences ITS (internal transcribed spacer) region nrDNA. Phylogenetic reconstructions identified two main clades: (1) “compound” clade composed subg. portion (2) “reduced”...
The Gnaphalieae are a group of sunflowers that have their greatest diversity in South America, Southern Africa, and Australia. objective this study was to reconstruct phylogeny the African using sequence data from two noncoding chloroplast DNA sequences, trnL intron trnL/trnF intergenic spacer. Included investigation genera basal groups, members subtribes Cassiniinae, Gnaphaliinae, Relhaniinae, representatives large Old World genus Helichrysum. Results indicate Gnaphaloid genera, Printzia...
Sarraceniaceae, a New World family of carnivorous plants, consist Sarracenia, Heliamphora, and the monotypic Darlingtonia. Despite extensive interest in these few explicit phylogenetic hypotheses are available for family. We investigate relationships using sequences internal transcribed spacer regions nuclear ribosomal DNA (ITS) chloroplast gene rbcL. One representative each genus was sequenced rbcL, whereas representatives all species family, except H. heterodoxa ionasii, were ITS. Both...
The Antennaria parlinii and A. neodioica agamic complexes are widely distributed across North America. Morphological data have suggested that these dioecious, perennial, entire‐leaved herbs of multiple hybrid origin from among five sexual diploid species. neglecta, plantaginifolia, racemosa, virginica hypothesized to be the progenitors complex, whereas sensu lato is thought include genomes solitaria. An electrophoretic study was initiated assess degree divergence species test hypotheses...
The current study presents 137 new chromosome determinations for Antennaria from throughout North America. Previously unreported species include A. atriceps, marginata, ro- sulata, and stenophylla. Although a few taxa remain uncounted, reasonable summary of the chromosomal diversity entire genus can be made. Three groups are recognized based primarily on ploidy level reproductive mode. One assemblage (group 1) is always sexual, diploid, unrelated to polyploid agamic complexes group 3....
The phylogenetic relationships among sexually reproducing species of Antennaria (Asteraceae) are poorly understood. An earlier cladistic analysis based on morphology did not fully resolve the phylogeny these taxa and therefore a different approach using molecular data was explored. internal transcribed spacer regions (ITS‐1 ITS‐2) nuclear ribosomal DNA were sequenced for 30 one from each outgroup genera Anaphalis, Ewartia, Leontopodium , Pseudognaphalium. ITS‐1 sequence in ranged 253 to 260...
The largest monophyletic group within Acacia is subgenus Phyllodineae, with more than 950 predominately Australian species, the majority characterised by adult foliage consisting of phyllodes. Molecular sequence data from internal transcribed spacers (ITS) nuclear ribosomal DNA repeat were used to investigate monophyly seven sections subgenus. A nested PCR approach was amplify ITS region. Fifty-one species representative all sequenced together one outgroup taxon Lysiloma divaricata...