Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Molecular Phylogenetics"”.
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Molecular phylogenetics of the Metazoan clade Lophotrochozoa
… Chapter 1 presents an introduction to phylogenetics of the Metazoa and the clade Lophotrochozoa. Chapter 2 analyzes higher level relationships between the major groups within the phylum Mollusca using sequences of the nuclear ribosomal large-subunit RNA gene (LSD rDNA). Results …
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Molecular phylogenetics and conservation aspects of antelopes
This thesis concerns the molecular phylogenetics of three tribes of the family Bovidae, the Antilopini, Neotragini, and Tragelaphini. None of these tribes have been studied extensively with molecular techniques. The tribe Antilopini is one of the most speciose tribes (it includes 6 genera with 20 …
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Molecular phylogenetics of the North American snake tribe Thamnophiini
… methods. In Chapter 3 I present a multi-locus molecular analysis of the relationships among nine genera in the North American snake tribe Thamnophiini in order to test the monophyly of the crayfish snakes (genus Regina) and the earth snakes (genus Virginia). Sequence data from seven genes were …
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Molecular Phylogenetics and Historical Biogeography of the Tribe Chiococceae (Rubiaceae)
… and biogeography of the Chiococceae using molecular DNA sequence data, and presents novel data on the tribal and generic delimitations, intergeneric relationships, and the origin and dispersal of this group.</p> <p>In the most recent tribal delimitations within subfamily Cinchonoideae, …
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Ecology and Molecular Phylogenetics of <i>Hydnora</i> (Hydnoraceae) in Southern Africa
… parasite-host nutritional relationships, and the molecular systematics of this group. Experimental addition of the primary pollinator, <em>Dermestes maculatus</em> to <em>Hydnora africana</em> chamber flowers demonstrated beetle imprisonment during the carpellate stage. Changes in the inner …
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Molecular Phylogenetics of Perciform Fishes Using the Nuclear Recombination Activating Gene 1
… This dissertation presents three studies: a molecular phylogenetic analysis of the putative suborders of the order Perciformes, an analysis of interrelationships of the families of the perciform suborder Percoidei, and a multi-gene investigation of the percoid superfamily Sparoidea.</p> …
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Molecular phylogenetics, taxonomy and niche-based conservation risk assessment of Thesium L. (Santalaceae)
… only six are accepted formally. Following recent molecular phylogenetic studies, the monophyly of the subgenus Hagnothesium is now well-established, but the circumscription of species within the section remains problematic given the complicated nomenclatural history which has added further …
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Molecular phylogenetics, systematics, reproductive safeguarding and chromosome evolution of the genus Lachenalia (Asparagaceae: Scilloideae)
The genus Lachenalia, comprising 142 species and belonging to the monocotyledonous family Asparagaceae, is morphologically diverse and the most species-rich member of the family in southern Africa. Past attempts to infer a well-resolved and robustly supported phylogenetic tree using Sanger …
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Molecular phylogenetics and the evolution of high-frequency echolocation in horseshoe bats (Genus Rhinolophus)
Horseshoe bats (genus Rhinolophus) belong to the Old World family Rhinolophidae. They are high-duty cycle bats and many species use echolocation calls dominated by high frequencies (above 60 kHz). Much is known about how they use their echolocation calls, but very little is known about why these …
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Molecular phylogenetics of the North American stoneflies (Insecta: Plecoptera), with description of a new species and family
… Arctoperlaria through construction of a robust molecular phylogeny of the North American Plecoptera. Live adult specimens, including 132 species across 92 of the 109 described North American genera, were collected from the United States and Canada. A total of 1400 orthologous genes selected from …
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Advances in tortricid systematics and identification (Lepidoptera: Tortricidae)
… such as matrix-based identification keys and molecular phylogenetics. Chapter 2 focuses on Tortricidae threatening U.S. agriculture. The resulting resource, Tortricids of Agricultural Importance (TortAI - http://www.tortai.org), is designed to aid in the identification of tortricid adults …
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A molecular phylogeny of the Microsporida
The molecular phylogenetics of the Microsporida were investigated using small subunit ribosomal RNA gene sequence data. The small subunit ribosomal RNA gene was sequenced and aligned for 27 species from 18 genera and analyzed using various eukaryotic, eubacterial, and archaebacterial sequences as …
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The phylogeography of Cheracebus species located in the Rio Negro basin and its implications for our understanding of the historical biogeography of Amazonia
… Demeni. We also examine for the first time using molecular phylogenetics, the phylogenetic relationships of C. lugens with other two species of this genus C. lucifer and C. purinus and the role of Japura and Solimoes rivers in the separation of these different species. We use three mitochondrial …
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TAXONOMY AND PHYLOGENOMICS OF CHRYSOBALANACEAE
… in a comprehensive account of all taxa; however, molecular phylogenetics revealed the non-monophyly of several genera, casting doubts as to the relationships suggested by the last classification, published in 2003. The first molecular phylogenetic analyses used single loci (Sanger sequences) and …
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Rethinking phylogenetics using Caryophyllales (angiosperms), matK gene and trnK intron as experimental platform
… all organisms has forever changed the field of molecular phylogenetics. Sequencing technology has improved to the point that scientics can now routinely sequence complete plastid/mitochondrial genomes and thus, vast amounts of data can be used to reconstruct phylogenies. These data are …
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Morphology of Acercaria: investigations of the ovipositor and internal anatomy
… about its higher-level phylogeny. The advent of molecular phylogenetics has done little to resolve arguments about the placement of various infraorders within Hemiptera, in spite of general confidence about their monophyly, which illustrates the need to take integrative approaches that include …
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Natural history, taxonomy, and phylogenetics of Appalachian flat-backed millipedes (Diplopoda: Polydesmida)
… of volume change over evolutionary time. Using a molecular phylogeny, I traced the miniaturization of chemical glands in the mimic genus Brachoria and found that in areas without Apheloria, Brachoria and related xystodesmids have larger chemical glands. Non-aposematic millipedes of the genus …
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