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A first generation genetic linkage map of the European flat oyster Ostrea edulis (L.) based on AFLP and microsatellite markers ArchiMer
Lallias, Delphine; Beaumont, A.r.; Haley, C.s.; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie.
This study presents the first genetic linkage map for the European flat oyster Ostrea edulis. AFLP and 20 microsatellite markers were genotyped in a three-generation pedigree comprised of 2 grand-parents, 2 parents and 92 progeny. Chi-square goodness of fit tests revealed high segregation distortion, which was significant for 32.8% of markers. Sixteen microsatellites and 235 AFLPs (170 AFLPs type 1:1 and 65 AFLPs type 3:1) were used to build sex-specific linkage maps using CriMap software. The first parental map (P1) consisted of 104 markers grouped in nine linkage groups, spanning 471.2 cM with an average spacing of 4.86 cM. The second parental map (P2) consisted of 117 markers grouped in ten linkage groups (which equals the haploid chromosome number),...
Tipo: Text Palavras-chave: Microsatellite; AFLP; Ostrea edulis; Flat oyster; Genetic linkage map.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2642.pdf
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A first genetic linkage map of the European flat oyster, Ostrea edulis : towards the identification of Bonamia resistance QTLs ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Beaumont, Andy.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, the next step is to identify QTLs for resistance to this parasite. A genetic map is therefore being established as a basis for QTL work. The reference family is an F2 family produced by single pair mating of two oysters from the same F1 family. The F1 family was itself produced from a bi-parental cross between a wild oyster and an individual from the...
Tipo: Text Palavras-chave: Genetic linkage map; Parasite; Genetic; QTLs; Resistance; Bonamia ostreae; Ostrea edulis; Flat oyster.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/acte-3464.pdf
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A first linkage map for the European flat oyster, Ostrea edulis towards the identification of Bonamia resistance QTLs ArchiMer
Lallias, Delphine; Beaumont, Andy; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Lapegue, Sylvie.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, a genetic map was therefore established as a basis for Quantitative Trait Loci (QTLs) analysis. The reference family was an F2 family coming from a first bi-parental cross between a wild oyster and an individual from the fifth generation inbred line of the Bonamia tolerance selection program. This inbred line had shown no mortality when reared in...
Tipo: Text Palavras-chave: Parasite; Bonamia ostreae; Bonamiosis; QTL; Genetic; Ostrea edulis; Flat oyster.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/acte-3459.pdf
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A high load of non-neutral amino-acid polymorphisms explains high protein diversity despite moderate effective population size in a marine bivalve with sweepstakes reproduction ArchiMer
Harrang, Estelle; Lapegue, Sylvie; Morga, Benjamin; Bierne, Nicolas.
Marine bivalves show among the greatest allozyme diversity ever reported in Eukaryotes, putting them historically at the heart of the neutralist-selectionist controversy on the maintenance of genetic variation. Although it is now acknowledged that this high diversity is most probably a simple consequence of a large population size, convincing support for this explanation would require a rigorous assessment of the silent nucleotide diversity in natural populations of marine bivalves, which has not yet been done. This study investigated DNA sequence polymorphism in a set of 37 nuclear loci in wild samples of the flat oyster Ostrea edulis. Silent diversity was found to be only moderate (0.7%), and there was no departure from demographic equilibrium under the...
Tipo: Text Palavras-chave: Nucleotide; Polymorphism; Marine bivalve; Deleterious; Mutations; Genetic load; Ostrea edulis.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23610/21444.pdf
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A long term study of bonamiosis in Quiberon bay, France ArchiMer
Arzul, Isabelle; Miossec, Laurence; Blanchet, Estelle; Garcia, Celine; Joly, Jean-pierre; Francois, Cyrille; Berthe, Franck.
Bonamiosis was first reported in association with mass mortality of flat oysters, Ostrea edulis, in June 1979 in L'Ile Tudy, Brittany. The disease rapidly spread to all of the oyster farming areas in France but also in other European countries. The French flat oyster production, which already suffered from another protozoan disease, marteiliosis, decreased from 5500 mt in 1979 to less than 2000 mt after 1980. In 2001, about 350 French farms sell 1650 mt of flat oysters. This production mainly relies on natural spat collection which specially occurs in Quiberon bay. One third of this spat is transferred from South to North Brittany for further growth. Quiberon bay constitutes an interesting site regarding the surveillance of bonamiosis because of the...
Tipo: Text Palavras-chave: Detection; Bonamia ostreae; Protozoan; Diseases; Pathology; Ostrea edulis; Oysters.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3314.pdf
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A physiological and biochemical approach to selecting the ideal diet for Ostrea edulis (L.) broodstock conditioning (part A) ArchiMer
Gonzalez-araya, Ricardo; Queau, Isabelle; Quere, Claudie; Moal, Jeanne; Robert, Rene.
To select the best microalgae for Ostrea edulis conditioning, four single species diets were fed to batches of broodstock, which were then compared using physiological and biochemical approaches. Ingestion and absorption were first studied, showing that Chaetoceros gracilis and Skeletonema marinoï were efficiently ingested (4.9–5.3 mg g−1 h−1) and absorbed (1.9–2.5 mg g−1 h−1) while Tetraselmis suecica led to the lowest physiological responses (0.36 and 0.12 mg g−1 h−1 respectively). When O. edulis were fed any microalgae except T-ISO with only 79 mg g−1, gonads accumulated carbohydrates from 116 to 141 mg g−1 and the extent of accumulation depended on the species supplied in the order T. suecica<C. gracilis<S. marinoï. When oysters were fed either...
Tipo: Text Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00033/14449/11748.pdf
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A preliminary genetic linkage map for the European flat oyster Ostrea eduli ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Halley, Chris; Boudry, Pierre; Beaumont, Andy.
The European flat oyster, Ostrea edulis, occurs naturally from Norway to Morocco in the North-Eastern Atlantic and throughout the Mediterranean. The oyster has been a harvested species for at least 6000 years. However, it successively suffered from over harvesting and then from two protozoan diseases during the 1960s and its production has drastically decreased in Europe from that time. Following two generations of selection for tolerance to one of these diseases (bonamiosis), our aim is to optimize this selection with the assistance of molecular markers, that is to say to implement marker-assisted selection. This will enhance the efficiency of selection by reducing the generation time, as the selection on sites cannot be made before the oysters are...
Tipo: Text Palavras-chave: QTLs; Ostrea edulis; Genetic linkage map; Genetic; European flat oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3473.pdf
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A preliminary genetic linkage map for the European flat oyster Ostrea edulis L. ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Harley, Crhis; Boudry, Pierre; Heurtebise, Serge; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic to European coasts, both Atlantic and Mediterranean. It has been exploited since Roman times, but its aquaculture production decreased from around 20000 tons in the 1950's to 1500 tons today because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has been undertaking a breeding program to produce families of oysters tolerant to Bonamia. In this context, a further step would be to identify QTLs for resistance to this parasite. Therefore, as a first step a genetic map is now being built. The establishment of a genetic linkage map will provide a foundation for the mapping of QTLs, with the ultimate objective to implement...
Tipo: Text Palavras-chave: QTLs; Ostrea edulis; Flat oyster; Genetic linkage map; Genetic.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3466.pdf
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Anaesthesia and gonad sampling in the European flat oyster (Ostrea edulis) ArchiMer
Suquet, Marc; Gonzalez, Ricardo; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Robert, Rene.
Controlled reproduction of the European flat oyster requires the development of tools adapted to this species, including a practical anaesthesia and gonad sampling protocol to facilitate sex determination and the verification of gametogenesis. Three replicate groups of 10 oysters (mean weight +/- SD: 29.9 +/- 8.5 g) were anaesthetised in 5 L containers using magnesium chloride designed either for laboratory (Flucka (R)) or agricultural (Dead Sea Work (R): DSW) use, at two concentrations (50 or 72 g L-1). No significant differences were observed in the percentages of oysters anaesthetised or subsequent oyster mortality with the different anaesthetics or concentrations, but increasing water temperature from 14.9 to 18.8 degrees C significantly increased the...
Tipo: Text Palavras-chave: Oyster; Ostrea edulis; Anaesthesia; Magnesium chloride; Gonad sampling.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00018/12907/9876.pdf
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Analyse bibliographique: historique de l'huître plate, Ostrea edulis, et la Bonamiose, maladie due au protozoaire Bonamia ostreae ArchiMer
Cochennec-laureau, Nathalie.
Oyster productions represent an important part of the french aquaculture. However, diseases are considered as the first limiting factors for the development of this activity around the world. Two exemples point out this problem for the french flat oyster production: Marteiliosis, the disease of the digestive gland, caused by Marteilia refringens, and Bonamiosis, the hemocytic disease, caused by Bonamia ostreae. This report proposes a bibliography analysis of major results obtained for Bonamiosis studies.
Tipo: Text Palavras-chave: Huître plate; Ostrea edulis; Bonamia ostreae; Bonamiose; Pathologie; European flat oyster; Oslrea edulis; Bonamia ostreae; Bonamiosis; Pathology.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00105/21661/19242.pdf
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Analyse du succès reproducteurs chez des populations naturelles et d'écloserie d'huître plate Ostrea edulis L. ArchiMer
Lallias, Delphine.
Cette étude vise à approfondir la connaissance de la biologie de la reproduction de l'huître plate Ostrea edulis afin de mieux comprendre comment les caractéristiques de la biologie de reproduction de l'espèce peuvent rendre compte des phénomènes de déficits en hétérozygote et de relation positive entre hétérozygotie et croissance. En particulier, elle vise à analyser le succès reproducteur en milieu naturel et dans les populations maintenues en écloserie. Cette étude repose sur l'utilisation de marqueurs microsatellites qui, du fait de leur fort polymorphisme, représentent des outils puissants d'assignation de parenté. Une première partie de l'étude a consisté à analyser les pontes issues de femelles incubantes prélevées dans le milieu naturel. Le nombre...
Tipo: Text Palavras-chave: Ostrea edulis; Microsatellites; Biologie de la reproduction; Variance du succès reproducteur.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00370/48167/48281.pdf
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Apport des informations moléculaires et cellulaires pour la caractérisation de la résistance de l'huître plate européenne vis-à-vis de la bonamiose, et pour la détection de signatures de la sélection naturelle ArchiMer
Harrang, Estelle.
The European flat oyster, an endemic species from European coasts, has been classified in the category of "endangered and/or declining species" since 2003. Indeed, the natural beds of this oyster, consumed since ancient times, have gradually been decimated by over-exploitation and by successive emergence of parasitic diseases. The parasite that causes the disease called bonamiosis has contributed to drastically reduce the French and European aquacultural production of flat oyster. Marine bivalve molluscs display two specificities that restrict possibilities to fight against diseases: they are grown in an open environment, and possess an innate immune system lacking in adaptive response. In this context, the selection of animaIs naturally resistant to...
Tipo: Text Palavras-chave: Huître plate Européenne; Ostre edulis; Bonamiose; Bonamia ostreae; Marqueurs SNP; Expression génique; Activité hémocytaire; Cartographie de liaison; QTL; EQTL; Populations naturelles; Diversité génétique; Sélection naturelle; European flat oyster; Ostrea edulis; Bonamiosis; Bonamia ostreae; SNP markers; Gene expression; Haemocytic activity; Linkage map; QTL; EQTL; Natural populations; Genetic diversity; Genetic structure; Natural selection.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00127/23785/21702.pdf
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Apport d'un programme de génétique à une filière de production aquacole : l'exemple de l'ostréiculture ArchiMer
Lapegue, Sylvie; Bedier, Edouard; Goyard, Emmanuel; Degremont, Lionel; Baud, Jean-pierre; Gerard, Andre; Goulletquer, Philippe; Boudry, Pierre.
Two oyster species are currently present along the French coasts : the indigenous European flat oyster (Ostrea edulis), and the Pacific cupped oyster (Crassostrea gigas), that has been introduced from Japan since the beginning of the 70ies. The flat oyster successively suffered from two protozoan diseases during the 60ies and its production decreased from 20 000 tons/year by that time to 1 500 tons/year nowadays. Consequently, the oyster production is principally (99%) based upon the Pacific oyster species with approximately 150 000 tons/year among which 90% are grown from the natural spat. However, the hatchery production of this species is developing and was estimated to 400 to 800 millions spat in 2002. Moreover, strengthened relationships between...
Tipo: Text Palavras-chave: Growth; Selection; Genetic breeding; Genetic; Ostrea edulis; Crassostrea gigas; Oysters; Croissance; Sélection; Amélioration génétique; Génétique; Ostrea edulis; Crassostrea gigas; Huîtres.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2003/acte-3491.pdf
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Approche comparative de la variabilité et de la structuration génétique chez deux espèces d'huîtres cultivées (Crassostrea gigas et Ostrea edulis) présentant des stratégies reproductives et des histoires contrastées ArchiMer
Boudry, Pierre; Launey, Sophie; Huvet, Arnaud.
The two common oyster species cultivated in Europe are the flat oyster Ostrea edulis and the cupped oyster Crassostrea gigas. These species have two really different reproduction strategies (oviparity versus larviparity) and histories (natural distribution versus introductions linked to oyster culture). We used microsatellite markers to compare the observed variabilities Europe wide. O. edulis presents a lower rate of alleles per locus than C. gigas. The observed structuration levels (global Fst and by pairs values) are similar for both species, but the spatial organisation of the diversity is different. In O. edulis, appears a differentiation based on the distance (concordance of the results with those obtained with the allozymes) whereas in C. gigas,...
Tipo: Text Palavras-chave: Différenciation génétique; Variabilité; Génétique; Crassostrea gigas; Ostrea edulis; Huîtres.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/acte-3455.pdf
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Approche in vitro et in vivo des interactions hémocytes/parasite Bonamia ostreae, chez l'huître plate Ostrea edulis ArchiMer
Denoix, Michael.
Depuis la fin des années soixante, la conchyliculture française doit faire face à des mortalités importantes d'huître plate, Ostrea edulis, causées entre autres, par le protozoaire, Bonamia ostreae, responsable de la bonamiose. Peu de moyens sont à l'heure actuelle à la disposition des professionnels pour lutter contre cette maladie. L'obtention d'animaux résistants à cette infection est une voie retenue et explorée par l'Ifremer pour combattre la bonamiose et tenter d'apporter des solutions aux conchyliculteurs. Dans cette optique, l'Ifremer, a entrepris un programme de sélection pour obtenir des animaux résistants en exerçant une pression de sélection par inoculation de parasites purifiés dans la cavité péricardique d'animaux anesthésiés. Les premières...
Tipo: Text Palavras-chave: Huître plate; Ostrea edulis; Bonamia ostreae; Hemocyte; Parasite.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00033/14443/11742.pdf
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Bilan de l'état zoosanitaire des mollusques en Méditerranée française : 1988-2001 ArchiMer
Pichot, Yves.
The fact that molluscs from the Mediterranean have benefited from a privileged zoosanitary condition compared to those of the other French coasts has for a long time limited the control of farms and natural fields in this area. It is only in the early 70's, because of the pathological problems and risks observed in other areas that Mediterranean molluscs started to be stictly under zoosanitory control. This control was however limited until the early 90's. With the implementation of the European directives 91/67 and 95/70 for the protection of molluscs against diseases and their propagation, with the creation in 1992 of REPAMO- IFREMER (with a watch unit in the Mediterranean), the control of molluscs in the Mediterranean has considerably improved. Since...
Tipo: Text Palavras-chave: Méditerranée; Zoosanitaire; Mortalité; Huître plate; Ostrea edulis; Huître creuse; Crassostrea gigas; Moule; Mytilus galloprovincialis; Palourde; Tapes decussatus; Telline; Donas trunculus; Mediterranean; Zoosanitary; Mortality; Flat oyster; Ostrea edulis; Pacific cupped oyster; Crassostrea gigas; Mussel; Mytilus galloprovincialis; Clam; Tapes decussatus; Coquina clam; Donax trunculus.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00145/25579/23717.pdf
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Bilan des productions expérimentales d'huîtres plates de 2005 à 2010 au Laboratoire de Génétique et Pathologie de La Tremblade ArchiMer
Heurtebise, Serge; Harrang, Estelle; Lallias, Delphine; Lapegue, Sylvie.
L’objectif de ce rapport est de détailler les productions d’huîtres plates européennes, Ostrea edulis, dans le cadre des projets de recherche développés autour de l’amélioration génétique de cette espèce. Nous avons choisi de synthétiser les actions de recherche dans un premier temps puis la production des huîtres et les expérimentations dans un ordre chronologique.
Tipo: Text Palavras-chave: Huître plate; Ostrea edulis; Production expérimentale; Amélioration génétique.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00013/12421/9211.pdf
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Biological characteristics of sperm in European flat oyster ( Ostrea edulis ) ArchiMer
Suquet, Marc; Pouvreau, Stephane; Queau, Isabelle; Boulais, Myrina; Le Grand, Jacqueline; Ratiskol, Dominique; Cosson, Jacky.
n brooding mollusc species that incubate larvae before their release in seawater, the biology of gametes remains poorly explored. The present study describes some biological characteristics of sperm of the European flat oyster, a native species that has been over-exploited in the past and is nowadays classified as an endangered species in Europe. Flat oysters were collected by divers in the Rade de Brest (Finistère, France), during its natural reproduction period. Gonadal pH is acidic (6.31 ± 0.10). Spermatozoa are clustered in spermatozeugmata, an acellular structure in which the sperm heads are embedded. After their transfer in seawater, spermatozeugmata have a mean diameter of 64 ± 3 μm and they release free spermatozoa for a mean duration of...
Tipo: Text Palavras-chave: Oyster; Ostrea edulis; Brooding species; Sperm; Spermatozeugmata; Endangered species.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00454/56539/58245.pdf
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Bonamia ostreae and Ostrea edulis : a stable host-parasite system in France? ArchiMer
Arzul, Isabelle; Miossec, Laurence; Blanchet, Estelle; Garcia, Celine; Francois, Cyrille; Joly, Jean-pierre.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. After its first description in June 1979 in L'Ile Tudy, Brittany, the parasite rapidly spread to all French oyster farming areas and in other European countries through transfers of live molluscs. Bonamiosis and marteiliosis, another protozoan disease appeared in the seventies, drastically reduced the French flat oyster production from 20 000 tonnes in 1970 to less than 2000 tonnes after 1981. In 2001, about 1650 t of flat oysters were marketed in France. The production is restricted to several areas specialised in reproduction, growth and/or marketing, and depends on transfers of animals. Most important production...
Tipo: Text Palavras-chave: Bonamia ostreae; Parasitology; Pathology; Ostrea edulis; Oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-6381.pdf
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Bonamia ostreae, parasite de l'huître plate, Ostrea edulis: sa position taxonomique parmi les parasites du groupe "microcell", analyses des interactions hôte/parasite chez plusieurs populations d'huîtres plates ArchiMer
Besnard-cochennec, Nathalie.
Bonamia ostreae is the causative agent of hemocyte disease. It has been detected first during mortalities occured in Franc in 1979. Bonamiosis spread rapidly among oysters farming in France and Europ. Another species, Bonamia sp. has been detected in New Zealand and Australia. These paasites were both included in the "microcell" group. This group contains 2 others parasites, Mikrocytos mackini affecting Crassostrea gigas in British Columbia (Canada) and M. roughleyi affecing Saccostrea glomerata in Australia. Structural and molecular caracterisation of all these parasites were realised. Results show tha B. ostreae, B. sp., B. exitiosus. Molecular tools are available for genus detection, Bonamia spp. and Mikrocytos and species identification (B. ostreae, B....
Tipo: Text Palavras-chave: Bonamia ostreae; Ostrea edulis; Taxonomie; Diagnotic; PCR; In situ hybridation; Hémocytes; Lectines; Phagocytose; Résistance; Bonamia ostreae; Ostrea edulis; Taxonomy; Diagnotic; PCR; In situ hybridization; Hemocytes; Lectins; Phagocytosis; Resistance.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00211/32223/30671.pdf
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