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 50 for “"DNA sequence data"”.
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Assessment of species boundaries of the Moringa Ovalifolia (Dinter & A. Berger) in Namibia using nuclear its DNA sequence data
… the nuclear Internal Transcribed Spacer (ITS) sequenced data analysis. A total of seventeen (17) edited sequences of M. ovalifolia together with thirteen (13) other sequences of Moringa retrieved from NCBI were used to construct phylogenetic trees in Molecular Evolutionary Genetic Analysis …
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Systematics, evolution and biogeography of the Southern African burrowing scorpions, Opistophthalmus C.L. Koch (Scorpiones, Scorpionidae)
… (morphological and behavioural) and molecular (DNA sequence) data. Futher aims were to test the monophyly of Opistophthalmus and of the family Scorpionidae, and to determine their phylogenetic positions with respect to other scorpionoid families and genera.
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Integrating Epigenetic Priors For Improving Computational Identification of Transcription Factor Binding Sites
… Nave computational approaches uses solely DNA sequence data to construct models known as Position Weight Matrices. However, the various assumptions and the lack of background genomic information leads to a high false positive rate. In an attempt to improve the predictive performance of a …
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Evolutionary history and hybridization in Passerina buntings
… females, Haldane’s rule predicts that mtDNA and z-linked loci will introgress less than autosomal loci. I tested this prediction using the hybrid zone between Passerina cyanea (Indigo Bunting) and Passerina amoena (Lazuli Bunting), two species that hybridize where their breeding ranges …
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The evolution of the Afrotemperate-endemic genus Macowania (Asteraceae) in the Drakensberg region of South Africa
… remaining species of Macowania and Arrowsmithia. DNA sequence data could not be obtained for several Macowania species, including the taxa from North Africa. The placement of these species within Macowania is confirmed by means of a parsimony analysis of morphological characters against a …
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Characterization of the 16S/23S ribosomal RNA intergenic spacer regions of Listeria
… by the polymerase chain reaction (PCR) and DNA sequencing. DNA sequencing data for the small rRNA IGS region showed that this IGS was approximately 244 bp in length and was highly homologous (95 to 99 %) in five of the six Listeria spp examined; ie., L. monocytogenes, L. innocua, L. …
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Statistical analysis of short template switch mutations in human genomes
… template switch mutations, which occur during DNA replication when there is a transient polymerase switch to an alternate template nearby in three-dimensional space. These variants are routinely captured at kilobase-to-megabase scales in studies of genetic variation by using methods for …
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Chloroplast DNA phylogenetics of the North American chestnuts and chinquapins (Castanea Mill., Fagaceae)
… Castanea were investigated using chloroplast DNA sequence data. Six plastome loci were PCR-amplified and sequenced in 77 accessions representing the three currently recognized North American Castanea species. Diagnostic morphological character states and a unique haplotype were shared among C. …
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Phylogeography of Darlingtonea Kentuckensis and Molecular Systematics of Kentucky Cave Trechines
… plateau in Kentucky and northern Tennessee. DNA sequence data from the mitochondrial gene cytochrome oxidase subunit I (COI) was collected from one to four individuals from 27 populations, and patterns of phylogeography and population structure were inferred from COI haplotypes. A …
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The systematics of Hypodontium
… place it in either. This study used molecular DNA sequence data from two chloroplast gene regions, tmLtmF and rps4, to investigate the family status of the genus. The results obtained showed that it is not a member of either Calymperaceae or Pottiaceae, and supports the erection of a new family …
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Taxonomy, phylogenetic and biogeographical relationships of African grassland Francolins (Genus: Scleroptila)
… a combination of molecular and whole-organismal data has opened up new avenues for avian taxonomy, phylogenetics and biogeography. Such a multifaceted approach is used here to identify diagnosable taxa within the Orange River Francolin Scleroptila levaillanloides species complex and resolve …
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Mentha (Lamiaceae) Phylogenetic Analysis Using Chloroplast TRNL-TRNF and Nuclear Ribosomal DNA ITS Sequences
… the ancestral base chromosome number using DNA sequence data from the chloroplast trnL-trnF and nuclear ribosomal internal transcribed spacer (ITS) regions. Based on trnL-trnF data, Mentha appears monophyletic. However, ITS data place the Mentha species into two distinct clades that include …
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Geographic drivers of avian diversification in the Philippine archipelago
… relationships of 20 avian groups with DNA sequence data. In chapter one, I reconstruct the historical biogeography of the Aethopyga sunbirds. In chapter two, I examine the distribution of genetic variation and plumage patterns in Robsonius ground-warblers, and described a new species. …
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The phylogeny, morphological evolution and biogeography of the Gaultherieae (Ericaceae).
… not been detected). Phylogenetic analyses using DNA sequence data have shown that the Gaultherieae and the wintergreen group are monophyletic. Optimization of morphological characters emphasized in classifications of the Gaultherieae onto the molecular phylogeny revealed that (1) fleshy calyces …
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Diversity of fungi associated with dieback of Ziziphus Mucronata in Limpopo Province, South Africa
… The isolates were further identified based on DNA sequence data from multiple genome regions including the internal transcribed spacer (ITS), beta-tubulin (BT) and the translation elongation factor (TEF) genomic regions and phylogenetic analyses. Fungi identified in this study were from …
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Evolutionary history and taxonomy of the titi monkeys (callicebinae)
… history of the subfamily Callicebinae using DNA sequence data. To infer phylogeny and estimate divergence times, we generated sequence data for 50+ wild-caught titi monkey specimens using multi-locus Sanger sequencing (22 nuclear and mitochondrial loci, > 14,500 bp) and reduced …
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EVOLUTION OF FRESHWATER CRABS IN LAKE MALAWI AND THE LAKE MALAWI BASIN IN THE EAST AFRICAN RIFT VALLEY
… morphological analysis coupled with preliminary DNA sequence data were used to determine the taxonomic status of the Malawi Blue Crab, and to determine the phylogenetic relationships between the Malawi Blue Crab and the freshwater crab fauna of the Lake Malawi basin, particularly the common and …
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On the phylogeny and diversity of the microsoroid ferns (Polypodiaceae)
… is not a monophyletic entity. By using mostly DNA sequence data, as well as the micro-morphological information (spore ornamentation), the focus of this thesis is to clarify the delimitation of each genus and subgroup within Microsoroideae, in order to improve our understanding of the diversity …
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Molecular systematics and biogeography of the Holarctic smelt family Osmeridae (Pisces)
… to several other families remains unclear. Using DNA sequence data from three mitochondrial and three nuclear genes from multiple individuals per species, I reconstructed the phylogenetic relationships among the 6 genera and 15 osmerid species. Phylogenetic reconstruction and divergence dating …
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