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Academic literature on the topic 'Hybride clonal Chrosomus eos-neogaeus'
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Journal articles on the topic "Hybride clonal Chrosomus eos-neogaeus"
Massicotte, Rachel, and Bernard Angers. "General-Purpose Genotype or How Epigenetics Extend the Flexibility of a Genotype." Genetics Research International 2012 (December 15, 2012): 1–7. http://dx.doi.org/10.1155/2012/317175.
Full textLeung, Christelle, Kevin Karl Duclos, Thomas Grünbaum, Richard Cloutier, and Bernard Angers. "Asymmetry in dentition and shape of pharyngeal arches in the clonal fish Chrosomus eos-neogaeus: Phenotypic plasticity and developmental instability." PLOS ONE 12, no. 4 (April 5, 2017): e0174235. http://dx.doi.org/10.1371/journal.pone.0174235.
Full textLeung, Christelle, Sophie Breton, and Bernard Angers. "A trait-based ecology to assess the acclimation of a sperm-dependent clonal fish compared to its sexual host." PeerJ 6 (November 2, 2018): e5896. http://dx.doi.org/10.7717/peerj.5896.
Full textDissertations / Theses on the topic "Hybride clonal Chrosomus eos-neogaeus"
Massicotte, Rachel. "L'épigénétique, moteur de l'évolution d'un vertébré asexué." Thèse, 2011. http://hdl.handle.net/1866/6259.
Full textThe aim of the thesis is to determine the extent of epigenetic variation, more specifically DNA methylation polymorphism, not linked to genetic variation in natural populations of an asexual vertebrate. This evaluation enables to better understand the importance that plays epigenetics processes in ecology and evolution. The biological model used is the clonal hybrid of the gynogenetic Chrosomus eos-neogaeus complex. Even in absence of genetic difference, an important phenotypic variability is observed among hybrids of the same clonal lineage living in different environments. Epigenetics, a modification of genes expression without a change at the DNA sequence, provides an explanation to this paradox. The diversity of phenotypes may be explained by differential methylation patterns of genes and/or alleles among genetically identical hybrids. The diversity of epiclonal lineages may be explained by the colonisation of many epiclonal lineages, established in response to the environment or stochastically. Many methods were used for screening the genome of clonal hybrids in order to highlight DNA methylation polymophism at the scale of an individual and among individuals of different populations.
Duclos, Kevin. "Variations développementales chez les poissons hybrides clonaux Chrosomus eos-neogaeus : transgressions phénotypiques en 3D." Thèse, 2016. http://hdl.handle.net/1866/16212.
Full textAn organism’s success is highly dependent on its phenotype. A major component of the phenotype is functional morphology because of its role in determining performance in a given environment clues as to their ecology. Morphological disparity and developmental differences between species can thus lead to ecological differences. This project assesses the role that mechanisms capable of generating morphological variation have in producing ecological differences between species within the hybrid fishes of the Chrosomus eos-neogaeus complex. Using X-ray based computer-aided micro-tomography and 3D geometric morphometrics, the shape of bones composing the jaws was described to measure morphological variation and developmental differences in the C. eos-neogaeus complex. Chrosomus eos-neogaeus hybrids displayed as much variation as parental species and novel, deemed transgressive, phenotypes. Hybrids were also markedly different from parental species in their patterns of allometric scaling and phenotypic integration. Finally, hybrids appeared to be plastic and able to acclimate to different environments. The results of this study indicate that changes in the development of hybrids could lead to phenotypic and, in turn, ecological differences with parental species.
Schwartz, Logan. "Impact d'une mitochondrie exogène sur le protéome du cybride Chrosomus eos." Thèse, 2014. http://hdl.handle.net/1866/11530.
Full textThe Chrosomus eos-neogaeus genetic complex regroups different forms of hybrids of these two species, among which a cybrid form, that harbours the nuclear genome of C. eos and the mitochondria of C. neogaeus. This peculiar model is thus a unique opportunity to study the influence of an exogenous mitochondria on the metabolism and cellular physiology in a living animal in the wild, and thus perfectly adapted to this atypical cellular environment. Mitochondria being at the core of fundamental biological processes, we expect that the presence of foreign mitochondria will modify gene expression and the resulting proteome of these fishes. The overall goal of this master thesis is thus to compare the proteome of pure (wild type) C. eos with the cybrid form sampled in similar lakes from the same geographical area so that most differences could be attributed to the different mitochondrial genomes. To achieve this goal, we used two dimensional electrophoresis. We selected a sub-group of proteins that showed the most extreme expression differences and identified these spots by mass spectrometric analyses (LC/MS). Results demonstrate that C. neogaeus mitochondria has a strong influence on gene expression in cybrid. Proteins identified bring new clues supporting the hypothesis that cybrid are more cold tolerant than the wild type biotype.