Genome-wide analysis of wild-type Epstein-Barr virus genomes derived from healthy individuals from the 1000 Genomes Project”. Evolution of the upstream gene regions: evidence for positive selection in the major chemosensory families”. Pablo Librado. The evolution of androdioecism in Prockia krusei: evidence from flower development and structure”.
The existence of neutral mutations has been known since the middle of the 20th century. However, fluctuating conditions also favor the evolution of the ability to produce suitable phenotypes in different environments, known as adaptive phenotypic plasticity. Our results show that while topology is a common determinant of evolutionary rates in human metabolic pathways, system-level dynamical properties also exert constraints on the evolution of underlying genes.
Premature closure of sutures causes structural changes of the skull, shape deformities due to compensatory growth and morphological novelties. Perhaps the most popular of the evolutionary explanations proposed to date is the pleiotropic theory of aging, proposed by G. We used several phylogeographic approaches (RAST, BEAST) to deduce the most likely location of the ancestor of extant MTBC lineages. to lead.
GENOME-WIDE ANALYSIS OF WILD-TYPE EPSTEIN-BARR VIRUS GENOMES DERIVED FROM HEALTHY INDIVIDUALS FROM THE 1000 GENOMES PROJECT.
POPULATION GENETICS AND GENOMICS
Subsequent phylogenetic, genetic variability and demographic reconstruction analyzes were performed with the appropriate multiple alignments of the corresponding core genomes. The demographic reconstruction indicates that two sub-lineages within ST578 have diverged in the Alcoy area since their first establishment more than 20 years ago. EVOLUTION OF THE UPSTREAM GENE REGIONS: EVIDENCE FOR POSITIVE SELECTION IN THE MAJOR CHEMOSENSOR FAMILIES.
Here we use functional annotation of the fly genome (modENCODE project) and DNA sequence data of 158 D. We found that positive selection shapes upstream nucleotide diversity in 22 of the 133 chemosensory genes examined, particularly in the outermost regions and GRs. Such an analysis was conducted after controlling for the underlying demographic history of the Raleigh population.
Surprisingly, some upstream regions also exhibit accelerated rates of CRE turnover in the lineage leading to D. The chromosomal inversion polymorphism has been a cornerstone in the study of evolution throughout the history of population genetics. In addition to this descriptive effect of inversions, a clear and complete understanding of the population dynamics of inversions is needed to fully understand its evolutionary role in.
It is therefore important to assess the role of the main evolutionary forces (mutation, drift and selection) in the population behavior of these two families of inversions. Inference of the recombination rates was performed using the coalescence-based algorithm implemented in the LDhat package using the program rhomap. We were able to explain more than 30% of the variation in inversion frequencies in humans.
WHOLE-EXOME SEQUENCE REVEALS A RAPID CHANGE IN THE FREQUENCY OF RARE FUNCTIONAL VARIANTS IN A FOUNDING HUMAN POPULATION. Rare variants are enriched for functional mutations and are expected to explain a significant part of the genetic etiology of human disease, thus having potential medical interest. Furthermore, the French-Canadian population contains a higher proportion of apparently deleterious functional variants, which may partially explain the increased incidence of genetic diseases in the province.
FUNCTIONAL EVOLUTION
The forebrain is the most complex region of the central nervous system and includes centers that play a key role in complex cognitive functions and behaviors. Theoretical models predict that reduced female function in androdioecious species can positively affect male function. Various stimuli and several hormonal pathways have been found to be involved in the development of the joint phase.
However, the main genetic and molecular triggers of the shift towards the birth stage remain unknown. After de novo assembly of solitary and shared libraries, the resulting contigs were filtered and then annotated. About a third (21k) of the assembled contigs showed significant differences in expression levels between solitary and gregarious individuals.
We interpret this as an indication of the great complexity of the differences between solitary and communal states that involve changes in almost every aspect of the animal's biology. The majority of differentially expressed contigs (19k) were overexpressed in the pooled library, indicating transcriptional activity possibly more active in the CNS of pooled animals than in the CNS of singletons. However, our understanding of the evolutionary pathways underlying the emergence of innovations remains highly fragmented.
Indeed, the evolution of the eukaryotic microbe Saccharomyces cerevisiae in the laboratory reveals two levels of evolution of functional novelties, including remodeling of functional interactions after gene duplication and fixation of destabilizing mutations mediated by mutational robustness and compensatory evolution. The ability of bacteria to transform by spontaneous uptake of DNA is one of the most interesting phenomena at both the fundamental and applied levels. The high frequency of these sequences in the genomes of the bacteria mentioned above, added to the preferences for these tags, results in an uptake bias against DNA coming from cells of the same species.
Even more surprising is the lack of definitive data on the real nature of these sequences, which are not fully established even for pathogenic species of the caliber of Haemophilus influenzae (the first free-living genome to be sequenced) and Neisseria gonorrhoeae (a species model for studies on horizontal gene transfer). A bioinformatic analysis was performed for all available complete and mapped genome sequences for members of the Pasteurellaceae and Neisseriaceae families. Regarding the nucleotide composition of these DUES, the results suggest that both Pasteurellaceae DUES are of ten base pairs, instead of the currently accepted nine.
PHYLOGENY AND SYSTEMATICS
Our results show that an ancestor of Seychelles caecilians abandoned direct development and re-evolved a free-living larval stage. To analyze EAA supply within unexplored Tremblaya genera, we performed a genetic screen of genes involved in the late steps of EAA biosynthetic pathways on five mealybug species from multiple lineages of both subfamilies Pseudococcinae and Phenacoccinae. 4th Meeting of the Spanish Society for Evolutionary Biology SESBE2013. princeps, the molecular analysis of T. phenacola genes suggests that this lineage undergoes a typical endosymbiont genome AT enrichment.
We also observed that HGT events were at least involved in the evolution of the tryptophan biosynthetic pathway in two T. Endo) symbiotic Methanogenic Archaea: Springer-Verlag. Despite their wide range, large size and bright green color, they remain quite unknown due to their remote habitats. The main branches of the tree split in the second half of the Miocene, simultaneously with.
4th Meeting of the Spanish Society for Evolutionary Biology SESBE2013. the last desiccation event in Australia, when the salt lakes where these beetles live developed their present-day structure, suggesting that this event had a significant role in the diversification of this group. It is also the most distinctive member of the Dugesiidae family with nearly 80 known species, and there are likely many more to be discovered. The preliminary results indicate a very ancient origin for the genus, placing it in the supercontinent Gondwana during the Mesozoic.
We also show that a significant proportion of the metazoan and embryophyte TF toolkits evolved earlier in their respective unicellular ancestors. To gain insight into the role of TFs in the development of both embryophytes and metazoans, we analyzed TF expression patterns throughout their ontogeny. The expression patterns observed in both groups recapitulate those for the entire transcriptome, but reveal important differences.
Ecological opportunity—access to new or previously inaccessible niches—has been classically identified as one of the most important drivers of phenotypic and species diversification. To study this question, we developed a robust time-calibrated phylogeny of the entire radiation and compiled data on body size (our proxy for phenotype) for most of the species in it. Our results indicate that island colonization has played the most prominent role in the evolutionary diversification of Australian geckos, producing accelerated rates of phenotypic and speciation diversification.
SELECTED POSTERS
Institut de Biologia Evolutiva (CSIC-UPF), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, 08003 Barcelona, Espanya. Departament de Biologia Animal, Biologia Vegetal i Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Espanya;. Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra.
Forskningsprogram om biomedicinsk informatik (GRIB), Fundació Institut Hospital del Mar d'Investigacions Médiques (FIMIM), Universitat Pompeu Fabra (UPF), Barcelona, Spanien.
LIST OF PARTICIPANTS
García-Roger Eduardo INSTITUTI CAVANILLES (VALENCIA) [email protected] Garrett Filipe UC BERKELEY/UNIVERSITAT DE BARCELONA [email protected].
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