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.
Results
Showing 1 to 18 of 18 for “"most recent common ancestor"”.
-
Platyrrhine Phylogenetics With A Focus On Callitrichine Life History Adaptations
… in callitrichines. First, to determine the most recent common ancestor of Anthropoid primates we took a phylogenomic approach, using the publicly available whole genome sequences of 17 mammal species. With high confidence, we determined here that Tarsier is the most recent common ancestor to …
-
New hypotheses about the origin of Pseudomonas syringae crop pathogens
Pseudomonas syringae is a common foliar plant pathogenic bacterium that causes diseases on many crop plants. We hypothesized that today's highly virulent P. syringae crop pathogens with narrow host range might have evolved after the advent of agriculture from ancestral P. syringae strains with wide …
-
HUMAN GENOME VARIATIONS AND EVOLUTION WITH A FOCUS ON THE ANALYSIS OF TRANSPOSABLE ELEMENTS
… all humans. Retrotransposons create one of the most abundant structural variants in the human genome and are divided in many families, with certain members in some families, e.g., L1, Alu, SVA, and HERV-K, remaining active for transposition. Along with other types of genomic variants, …
-
Characterizaion and Chemical Rescure of the Phenotype of ors-3, a Knockout mutant line of PpORS in Physcomitrella patens
… trees, and may resemble closely their most recent common ancestor. PpORS knockouts were previously generated and partially characterized (Li et al., Planta, 2018, 247: 527–541). This study aimed to investigate further the in planta functions and evolutionary roles of PpORS. Ors-3 (an …
-
A PHYLOGENETIC REEVALUATION OF THE GENUS GAVIA (AVES: GAVIIFORMES) USING NEXT-GENERATION SEQUENCING
… than morphological characters, has been used in recent decades to resolve systematic relationships. Advancements in molecular techniques have improved avian phylogenetics and have led to new insights on the relationships between and within taxa. Loons (Aves: Gaviiformes) are one of the oldest …
-
EVOLUTIONARY RELATIONSHIPS IN POLYGONEAE RCHB. (POLYGONACEAE) WITH AN EMPHASIS ON THE AMPHI-PACIFIC MUEHLENBECKIA MEISN.
… it is attempted to pinpoint geographic areas the most recent common ancestor of <em>Muehlenbeckia</em> occupied and to estimate divergence times within <em>Muehlenbeckia</em> using a fossil calibration point. Furthermore, because <em>Muehlenbeckia</em> shows great morphological variability and its …
-
Virus discovery using current and novel methods
… alone, including revised substitution rates and most recent common ancestor dates, as well as geographic movement and extinction of strains. The identification of viral sequences in NGS datasets relies heavily on sequence-based matching of unknown sequences to a database of known sequences. …
-
Ancestral structures in population genetics and a generalisation to birth-death processes with catastrophes
… (pLD-ASG), which consists of a set of potential ancestors of the sampled individual at any given time, to investigate the line of descent of a randomly-sampled individual from a contemporary population. We trace this ancestral line back into the distant past, far beyond the most recent common …
-
Evolutionary and Paleobiochemical Analyses of Heme Peroxidases
… events has been traced, with an MPO-EPO-LPO most recent common ancestor (MRCA) arising from a gene duplication with extant TPO. A further duplication event gave rise to (i) the MPO-EPO MRCA, and (ii) the lineage leading to extant LPO. The final and most recent duplication of the MPO-EPO MRCA …
-
New Insights into the Evolution of Learned Vocalization from the Australian Zebra Finch, Taeniopygia castanotis
<p>The common goal of my thesis is to understand the causative events in evolution that produced a clade of song learning birds from non-song learning ancestors.This information is important for shedding light on the evolution of spoken language in our own human lineage, where evolutionary analyses …
-
Characterising the evolutionary dynamics of hypermutated tumours using single-cell sequencing
… of the disease remain unknown for MMRD cancers. Recently, the advent of single-cell (WGS) methodologies allowed for the assignment of mutations to individual cells, making the reconstruction of single-cell lineage histories possible. As a first contribution in my PhD, I have reconstructed the …
-
Characterizing the effect of mutation recombination and reassortment on the genetic diversity of African horse sickness virus genomes
… over the whole genome. The calculated time to most recent common ancestor, differs significantly among the genome sequences, indicating the influence of reassortment or recombination on the genomes. Using RDP4, Bootscan and Simplot programs, intragenic recombination events were predicted in …
-
From Genes to Traits and Ecosystems: Evolutionary Ecology of <i>Sphagnum</i> (Peat Moss)
… Chapter 2, a meta-analysis of data from recent studies is used to relate patterns of functional trait variation to the phylogeny of <i>Sphagnum</i>. The results suggest that interspecific variation in various measures of growth, decomposability, and litter biochemistry is phylogenetically …
-
Identification of transcription factor genes in plants
… components, i.e., a basal/general machinery common to all expressed genes, and a specific/regulatory machinery, which differs among genes and is the responsible for proper gene expression in response to environmental or developmental signals. This specific machinery is composed of …
-
Models and Methods in Cultural and Social Evolution
… such as the ability to estimate the time to the most recent common ancestor (MRCA) of a sample of genetic sequences or of a group of individuals. Here we introduce a model of cultural genealogies that is a step toward answering similar questions for cultural traits. In our model individuals can …
-
Functional Genome-wide Association Studies (fGWAS) and genomics landscape of signatures of polygenic adaptation in Botswana populations with HIV-1 C infection
… widely utilized for functional-GWAS research, recent studies have also linked mitochondria DNA (mtDNA) haplotypes to various HIV outcomes. We explored the possibility of using both autosomal and mtDNA SNPs to enrich fGWAS analysis. On another hand, people from Botswana (collectively called …
-
EPIDEMIOLOGIA GENOMICA DELLE PRINCIPALI VARIANTI DI SARS-COV-2 CIRCOLANTI IN ITALIA PRIMA E DURANTE L'ERA OMICRON
… complete genomic sequences stored in one of the most widely used databases (GISAID, https://gisaid.org/, as of September 2023). These kinds of approaches together with genomic epidemiology have made it possible to trace international pandemic flows, to reconstruct outbreaks and transmission …
-
Male genital tract versus blood HIV-1 compartmentalization and selection: the first step of the transmission bottleneck?
… but to varying extents. Donor SVB043 had the most compartmentalized viral populations between blood and the male genital compartment using all the three measures of compartmentalization. Further analysis of the phylogenetic trees revealed that some clusters contained either purely blood or …