Consulta: creatorFacets:"Reisser, Celine"
Registros recuperados: 8
Data/hora: 10/06/2024 18:26:06

Identification of General Patterns of Sex-Biased Expression in Daphnia, a Genus with Environmental Sex Determination
Provedor de dados: 5
Autores: Molinier, Cecile; Reisser, Celine; Fields, Peter; Segard, Adeline; Galimov, Yan; Haag, Christoph R.
Daphnia reproduce by cyclic-parthenogenesis, where phases of asexual reproduction are intermitted by sexual production of diapause stages. This life cycle, together with environmental sex determination, allow the comparison of gene expression between genetically identical males and females. We investigated gene expression differences between males and females in four genotypes of Daphnia magna and compared the results with published data on sex-biased gene expression in two other Daphnia species, each representing one of the major phylogenetic clades within the genus. We found that 42% of all annotated genes showed sex-biased expression in D. magna. This proportion is similar both to estimates from other Daphnia species as well as from species with genetic...
Tipo: Text
Palavras-chave: Differential gene expression; Males; Females; Daphnia; ESD; Genetics of Sex.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00442/55322/56832.pdf

Colour plasticity in the shells and pearls of animal graft model Pinctada margaritifera assessed by HSV colour quantification
Provedor de dados: 5
Autores: Stenger, Pierre-louis; Vidal-dupiol, Jeremie; Reisser, Celine; Planes, Serge; Ky, Chin-long.
The bivalve Pinctada margaritifera has the capacity to produce the most varied and colourful pearls in the world. Colour expression in the inner shell is under combined genetic and environmental control and is correlated with the colour of pearls produced when the same individual is used as a graft donor. One major limitation when studying colour phenotypes is grader subjectivity, which leads to inconsistent colour qualification and quantification. Through the use of HSV (Hue Saturation Value) colour space, we created an R package named ‘ImaginR’ to characterise inner shell colour variations in P. margaritifera. Using a machine-learning protocol with a training dataset, ImaginR was able to reassign individual oysters and pearls to predefined human-based...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00497/60900/64239.pdf

Strong genetic isolation of the black-lipped pearl oyster (Pinctada margaritifera) in the Marquesas archipelago (French Polynesia)
Provedor de dados: 5
Autores: Reisser, Celine; Lo, Cédrik; Schikorski, David; Sham Koua, Manaarii; Planes, Serge; Ky, Chin-long.
The French Polynesian islands are internationally known for their black pearls, produced by culture of the black lipped pearl oyster Pinctada margaritifera. The ongoing development of hatcheries for P. margaritifera in French Polynesia poses new challenges for the industry, particularly regarding the maintenance of genetic diversity in the hatchery stocks. This emphasizes the necessity to characterize the genetic diversity and differentiation within natural and exploited populations, to carefully select putative parental populations. The present study aimed at validating the phylogenetic status and investigating genetic attributes of populations from the only two non-exploited archipelagos of French Polynesia, the Marquesas archipelago, and the Australes...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62059/66234.pdf

Microplastics Affect Energy Balance and Gametogenesis in the Pearl Oyster     Pinctada margaritifera
Provedor de dados: 5
Autores: Gardon, Tony; Reisser, Celine; Soyez, Claude; Quillien, Virgile; Le Moullac, Gilles.
Plastic pollution in the environment is increasing at global scale. Microplastics (MP) are derived from degradation of larger plastic items or directly produced in microparticles form (&lt;5 mm). Plastics, widely used in structures and equipments of pearl farming, are a source of pollution to the detriment of the lagoon ecosystem. In order to evaluate the impact of MP on the physiology of Pinctada margaritifera, a species of ecological and commercial interests, adult oysters were exposed to polystyrene microbeads (micro-PS of 6 and 10 μm) for 2 months. Three concentrations were tested: 0.25, 2.5, 25 μg L-1 and a control. Ingestion and respiration rate and assimilation efficiency were monitored on a metabolic measurement system to determine the individual...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54684/56104.pdf

Environmentally Driven Color Variation in the Pearl Oyster Pinctada margaritifera var. cumingii (Linnaeus, 1758) Is Associated With Differential Methylation of CpGs in Pigment- and Biomineralization-Related Genes
Provedor de dados: 5
Autores: Stenger, Pierre-louis; Ky, Chin-long; Reisser, Celine; Cosseau, Céline; Grunau, Christoph; Mege, Mickael; Planes, Serge; Vidal-dupiol, Jeremie.
Today, it is common knowledge that environmental factors can change the color of many animals. Studies have shown that the molecular mechanisms underlying such modifications could involve epigenetic factors. Since 2013, the pearl oyster Pinctada margaritifera var. cumingii has become a biological model for questions on color expression and variation in Mollusca. A previous study reported color plasticity in response to water depth variation, specifically a general darkening of the nacre color at greater depth. However, the molecular mechanisms behind this plasticity are still unknown. In this paper, we investigate the possible implication of epigenetic factors controlling shell color variation through a depth variation experiment associated with a DNA...
Tipo: Text
Palavras-chave: Pearl oyster; Environmental pressure; Depth; Color change; Pigmentation; DNA methylation; Methylome characterization.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79667/82436.pdf

Whole transcriptome sequencing and biomineralization gene architecture associated with cultured pearl quality traits in the pearl oyster, Pinctada margaritifera
Provedor de dados: 5
Autores: Le Luyer, Jeremy; Auffret, Pauline; Quillien, Virgile; Leclerc, Nicolas; Reisser, Celine; Vidal-dupiol, Jeremie; Ky, Chin-long.
Background Cultured pearls are unique gems produced by living organisms, mainly molluscs of the  Pinctada genus, through the biomineralization properties of pearl sac tissue.  Improvement of P. margaritifera pearl quality is one of the biggest challenges that  Polynesian research has faced to date. To achieve this goal, a better understanding of the  complex mechanisms related to nacre and pearl formation is essential and can now be  approached through the use of massive parallel sequencing technologies. The aim of this  study was to use RNA-seq to compare whole transcriptome expression of pearl sacs that  had producing pearls with high and low quality. For this purpose, a comprehensive  reference transcriptome of P. margaritifera was built based on...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Biomineralization; Pearl quality; Pearl sac; RNA-seq.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00475/58695/61207.pdf

Molecular Pathways and Pigments Underlying the Colors of the Pearl Oyster Pinctada margaritifera var. cumingii (Linnaeus 1758)
Provedor de dados: 5
Autores: Stenger, Pierre-louis; Ky, Chin-long; Reisser, Celine; Duboisset, Julien; Dicko, Hamadou; Durand, Patrick; Quintric, Laure; Planes, Serge; Vidal-dupiol, Jeremie.
The shell color of the Mollusca has attracted naturalists and collectors for hundreds of years, while the molecular pathways regulating pigment production and the pigments themselves remain poorly described. In this study, our aim was to identify the main pigments and their molecular pathways in the pearl oyster Pinctada margaritifera—the species displaying the broadest range of colors. Three inner shell colors were investigated—red, yellow, and green. To maximize phenotypic homogeneity, a controlled population approach combined with common garden conditioning was used. Comparative analysis of transcriptomes (RNA-seq) of P. margaritifera with different shell colors revealed the central role of the heme pathway, which is involved in the production of red...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Color; Pigment; Transcriptomics; Raman spectroscopy.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79671/82446.pdf

Population Connectivity and Genetic Assessment of Exploited and Natural Populations of Pearl Oysters within a French Polynesian Atoll Lagoon
Provedor de dados: 5
Autores: Reisser, Celine; Gendre, Romain Le; Chupeau, Cassandre; Lo-yat, Alain; Planes, Serge; Andréfouët, Serge.
In French Polynesia, the production and exportation of black pearls through the aquaculture of the black-lip pearl oyster Pinctada margaritifera provide the second largest economic income for the country after tourism. This industry entirely relies on the collection of natural spats from few highly recruiting lagoons. In recent years, pearl oyster producers have experienced variable success rates in spat collection, with significant spatial and temporal variability in spat supply, driving uncertainty in the future of pearl production. This study combines, for the first time in a farmed lagoon, genetic (SNPs), demographic (sex ratio, age), and biophysical data (larval dispersal modelling) to shed new light on population dynamics, connectivity, and spat...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Connectivity; Population genomics; Pearl farming; Larval dispersal modelling; MARS3D.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73503/72810.pdf