Consulta: subjectFacets:"Pearl quality"
Registros recuperados: 5
Data/hora: 17/06/2024 10:58:49

Evidence of donor effect on cultured pearl quality from a duplicated grafting experiment on Pinctada margaritifera using wild donors
Provedor de dados: 5
Autores: Tayale, Alexandre; Gueguen, Yannick; Treguier, Cathy; Le Grand, Jacqueline; Cochennec-laureau, Nathalie; Montagnani, Caroline; Ky, Chin-long.
Producing high quality cultured black pearls from Pinctada margaritifera is one of the major challenges for the "pearl oyster" industry in French Polynesia. In order to assess donor effect on cultured pearl quality, wild Pinctada margaritifera originating from the Tuamotu Archipelago were used in a duplicated grafting experiment. After 12 months of culture, nucleus retention was assessed and seven pearl quality traits recorded on the 454 cultured pearls harvested from the experiment. The traits scored were nacre thickness and pearl weight, surface defects, lustre, grade, and the colour components: 1) darkness of cultured pearl colour, and 2) visual perception of colour class (bodycolor and/or overtone). Our results demonstrate for the first time that...
Tipo: Text
Palavras-chave: Cultured pearl oyster; Pearl quality; Nacre; Donor mollusc; Genetic selection; Pteriidae; Blacklip pearl oyster; Pinctada margaritifera; French Polynesia.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22757/20541.pdf

Influence of preoperative food and temperature conditions on pearl biogenesis in Pinctada margaritifera
Provedor de dados: 5
Autores: Latchere, Oihana; Le Moullac, Gilles; Gaertner-mazouni, Nabila; Fievet, Julie; Magre, Kevin; Saulnier, Denis.
Trophic conditions and water temperature strongly influence bivalve physiological processes and metabolism. In black-lip pearl oyster Pinctada margaritifera, these parameters have been shown to affect shell biomineralization. The present study investigated the effect of preoperative food level (i.e., microalgal concentration) and temperature on pearl biomineralization. Donor and recipient oysters were conditioned at different levels of food and temperature during the preoperative phase to evaluate the influence of these factors on 1) pearl retention rate (grafting success), 2) expression of genes involved in biomineralization in the mantle and pearl sac and 3) pearl quality traits. Our study confirmed the influence of both microalgal concentration and...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Cultured pearl; Biomineralization; Environment; Gene expression; Pearl quality.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00387/49799/50367.pdf

Cultured Pearl Surface Quality Profiling by the Shell Matrix Protein Gene Expression in the Biomineralised Pearl Sac Tissue of Pinctada margaritifera
Provedor de dados: 5
Autores: Blay, Carole; Planes, Serge; Ky, Chin-long.
Nucleated pearls are produced by molluscs of the Pinctada genus through the biomineralisation activity of the pearl sac tissue within the recipient oyster. The pearl sac originates from graft tissue taken from the donor oyster mantle and its functioning is crucial in determining key factors that impact pearl quality surface characteristics. The specific role of related gene regulation during gem biogenesis was unknown, so we analysed the expression profiles of eight genes encoding nacreous (PIF, MSI60, PERL1) or prismatic (SHEM5, PRISM, ASP, SHEM9) shell matrix proteins or both (CALC1) in the pearl sac (N = 211) of Pinctada margaritifera during pearl biogenesis. The pearls and pearl sacs analysed were from a uniform experimental graft with sequential...
Tipo: Text
Palavras-chave: Biomineralisation; Relative gene expression; Pearl sac; Biomarkers; Pearl quality; Pinctada margaritifera.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54622/56022.pdf

Family effect on cultured pearl quality in black-lipped pearl oyster Pinctada margaritifera and insights for genetic improvement
Provedor de dados: 5
Autores: Ky, Chin-long; Blay, Carole; Sham-koua, Manaarii; Vanaa, Vincent; Lo, Cedrik; Cabral, Philippe.
Individual Pinctada margaritifera molluscs were collected from the Takapoto atoll (Tuamotu Archipelago, French Polynesia) and used to produce ten first generation full-sib families in a hatchery system, following artificial breeding protocols. After three years of culture, these progenies were transferred to Rangiroa atoll (Tuamotu Archipelago, French Polynesia) and tested for their potential as graft donors. A large-scale grafting experiment of 1500 grafts was conducted, in which a single professional grafter used ten individual donor oysters from each of the ten families, grafting 15 recipient oysters from each donor. The recipient oysters were all obtained from wild spat collection in Ahe (Tuamotu Archipelago, French Polynesia). After 18 months of...
Tipo: Text
Palavras-chave: Cultured pearl oyster; Pearl quality; Progeny effects; Heritability; Genetic selection; Pinctada margaritifera; French Polynesia.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26310/24380.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