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Registros recuperados: 97
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A first genetic linkage map of the blue mussel Mytilus edulis ArchiMer
Lallias, Delphine; Hecquet, Céline; Boudry, Pierre; Lapegue, Sylvie; Beaumont, Andy.
The blue mussel, Mytilus edulis, is widely distributed in the northern hemisphere, from the White Sea to the Atlantic coast of southern France, and is an economically important species (1 million tons per year, FAO, 2002). At present however, little domestication has been achieved with bivalves, in contrast to agricultural crops, livestock and horticultural species like tomatoes, where selection and production is entirely controlled by man. For bivalves, despite their economic importance, no lines with selected characteristics have been taken to the production scale. There is therefore a need to make up for lost time. Our interest in genetic mapping sprang from some results showing a genetic component to some economically important traits like growth and...
Tipo: Text Palavras-chave: QTLs; AFLP; Genetic; Mussel; Mytilus edulis; Genetic linkage map.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/acte-3465.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 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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Amylase polymorphism affects growth in the cupped oyster Crassostrea gigas ArchiMer
Huvet, Arnaud; Samain, Jean-francois; Boudry, Pierre; Bedier, Edouard; Ropert, Michel; Van Wormhoudt, A..
The better understanding of physiological and environmental factors that determine optimal food conversion efficiencies is of major interest for the cupped oyster Crassostrea gigas for which the strong increase of aquaculture has been correlated in France with a decrease in productivity due to competition between aquatic species for limited food supplies at grow-out sites. To investigate the non-neutrality of the polymorphism of amylase, a key enzyme for carbohydrate assimilation, in oyster physiology, we report in the present paper the growth and survival measurement of amylase genotypes within five bi-parental C. gigas families, bred to be polymorph at the two PCR-RFLP amylase markers, and reared over one year under standard culture conditions in two...
Tipo: Text Palavras-chave: Amylase markers; Growth; Amylase Polymorphism; Genetic; Oysters; Crassostrea gigas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3311.pdf
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Aneuploidy and its relationship with growth in different populations of the Pacific oyster (Crassostrea gigas, Thunberg) ArchiMer
Boudry, Pierre; Leitao, Alexandra; Mccombie, Helen; Thiriot-quievreux, Catherine.
Cytogenetic abnormalities arising both in mitosis and meiosis are known to be common in bivalves. Here we review result obtained from the observations of somatic aneuploidy in different populations of the commercially important Pacific oyster, Crassostrea gigas. The oysters studied were either (1) produced in IFREMER hatcheries between 1986 and 1999, (some of these were part of the EU funded programme GENEPHYS); or (2) collected from wild populations along the French Atlantic coast. Chromosome numbers were scored from 30 mitotic metaphases in gill tissue per individual studied. Aneuploid cells (2n - X) were observed in all the 13 populations studied. A highly significant negative correlation was observed between the level of aneuploidy and growth, i.e....
Tipo: Text Palavras-chave: Growth; Genetic; Aneuploidy; Crassostrea gigas; Pacific oysters.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/acte-3446.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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Avaliação e conservação do cavalo pantaneiro. Infoteca-e
SANTOS, S. A.; MAZZA, M. C. M.; SERENO, J. R. B.; ABREU, U. G. P. de; SILVA, J. A. da.
Os cavalos introduzidos no Pantanal pelos conquistadores durante a epoca da colonizacao, encontraram na regiao condicoes ambientais propicias para sua multiplicacao. Como consequencia dos processos adaptativos e da selecao natural por mais de dois seculos e com pouca ou nenhuma interferencia antropica, surgiu um tipo adaptado ao meio. Com o desenvolvimento da pecuaria na regiao, o cavalo Pantaneiro constituiu-se num fator de importancia economica e social, tornando-se imprescindivel em trabalhos de gado e no transporte regional. No final do seculo XIX, a raca entrou em declinio principalmente devido a doenca conhecida como Peste das cadeiras e, posteriormente, outras ameacas como cruzamentos indiscriminados com outras racas e, mais recentemente a Anemia...
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Equino; Cavalo pantaneiro; Avaliacao; Manejo reprodutivo e sanitario; Morfologia; Equine; Pantaneiro horse; Conservation; Reproductive management; Evaluation; Genetic; Morphology.; Conservação; Crescimento; Criação; Genética; Pecuária.; Pantanal..
Ano: 1995 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/784346
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Breeding and feeding pigs in Australia and Vietnam AgEcon
Tisdell, Clement A.; Wilson, Clevo.
This report establishes that ACIAR Research Project AS2/1994/023, ‘Breeding and feeding pigs in Australia and Vietnam’ (supported by ACIAR from July 1995 to the end of 2000) has yielded an extraordinarily high rate of economic return on the funds invested. The collaborating agencies were the Department of Primary Industries, Queensland, James Cook University and The University of Queensland in Australia, and the Institute of Agricultural Sciences of South Vietnam in Vietnam. The best estimate benefit–cost ratio for investment in this project is at least 159:1 with a corresponding internal rate of return of 900% and a net present value of A$496 million. This is a total value, not an annual value. To give context to the number A$496 m, in 2000, 1.3 million...
Tipo: Book Palavras-chave: Pig; Vietnam; Australia; Breeding; Feeding; High rate of return; High impact; High economic return; DPI QLD; James Cook University; University of QLD; Institute of Agricultural Sciences of South Vietnam; Benefit-cost ratio; Net present value; Internal rate of return; Significant returns; Genetic; Nutrition; Pork; Agribusiness; Farm Management; Food Consumption/Nutrition/Food Safety; International Development; Livestock Production/Industries; Production Economics.
Ano: 2001 URL: http://purl.umn.edu/47695
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Chromosome loss in tetraploid families of the Pacific oyster Crassostrea gigas ArchiMer
Mccombie, Helen; Lapegue, Sylvie; Cornette, Florence; Ledu, Christophe; Boudry, Pierre.
Alterations of chromosome number have been observed in the somatic tissue of Crassostrea gigas diploids and artificial polyploids bred in this species. Tetraploid animals with lower chromosome counts in some or all of their somatic tissue are considered undesirable as parents either for commercial triploids (produced via a cross with diploids) or for tetraploid breeding because (1) they may confer the tendency to lose chromosomes and revert to lower ploidy levels to their offspring or (2) their offspring could have a lower ploidy directly because of potential links between somatic and gametic chromosome loss. The present study evaluated the phenomenon in bi-parental tetraploid families bred from parents of differing ploidy quality, including a...
Tipo: Text Palavras-chave: Tetraploid; Chromosome; Genetic; Crassostrea gigas; Oyster.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/acte-3435.pdf
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Coleta de germoplasma de bacuri (Platonia insignis Mart.) na Amazônia I. Microrregião campos do Marajó (Soure/Salvaterra). Infoteca-e
GUIMARÃES, A. D. G.; MOTA, M. G. da C.; NAZARÉ, R. F. R. de.
bitstream/item/42253/1/Boletim-Pesquisa-132-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Coleta; Soure; Salvaterra; Ilha de Marajó; Brasil; Genetic; Collect.; Bacuri; Germoplasma; Genética; Melhoramento; Platonia Insignis.; Amazonia; Germplasm.; Breeding.
Ano: 1992 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379659
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Combined functional genomics and genetic approach in oyster to identify summer mortality-resistant markers ArchiMer
Huvet, Arnaud; Lapegue, Sylvie.
The oyster Crassostrea gigas has global distribution and for the past several years the highest annual production of any freshwater or marine organism. Economic importance of oysters motivates a great deal of biological research, which provides the most immediate scientific rationales for sequencing ESTs and developing genomic tools.
Tipo: Text Palavras-chave: Environmental genomics; Comparative genomics; Functional genomics; Markers; Summer mortalities; Genetic; Oysters; Crassostrea gigas.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4006.PDF
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Conservacao de recursos geneticos florestais: estrategias e parametros geneticos e ecologicos para a conservacao in situ de recursos geneticos. Infoteca-e
CAVALCANTI, T. B.; KAGEYAMA, P. Y..
bitstream/item/145329/1/CENARGEN-CONSERVACAO-DE-RECURSOS-GENETICOS-FLORESTAIS-ESTRATEGIAS-E-PARAMETROS.pdf
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Germoplasma %% Forestry; Conservation; Genetic; Resource.; Floresta.; Germplasm..
Ano: 1997 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/174566
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Contribuição ao estudo do guaraná. Infoteca-e
NAZARÉ, R. F. R. de; FIGUEIREDO, F. J. C..
bitstream/item/55262/1/CPATU-DOC-4-.pdf
Tipo: Documentos (INFOTECA-E) Palavras-chave: Origem; Valor terapeutico; Uso; Formação; Origin; Therapeutic value; Use; Seed; Genetic; Cultting; Formation; Disease; Pest; Economy.; Composição Química; Economia; Doença; Guaraná; Genética; Germinação; Muda; Paullinia Cupana; Praga; Semente; Tecnologia.; Germination; Chemical composition; Technology..
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382454
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Development of SNPs and their use for the identification of summer mortality resistance QTLs in the Pacific oyster (Crassotrea gigas) ArchiMer
Sauvage, Christopher; Lapegue, Sylvie; Bierne, Nicolas; Boudry, Pierre.
Summer mortalities of the Pacific cupped oyster Crassostrea gigas have been described in the literature for decades. One solution to overcome this problem would be to select animals more tolerant to summer mortalities, as this trait was shown to be highly heritable (Degrémont, 2003). The identification of markers associated to the resistance would allow to better understand this complex phenomenon and, eventually to establish markers assisted selection. Recently, two moderately dense genetic linkage maps have been established in the Pacific oyster based on microsatellites and AFLP markers (Hubert and Hedgecock, 2004; Li and Guo, 2004). In this context, the development and mapping of SNPs will increase the density of the linkage map and consequently the...
Tipo: Text Palavras-chave: QTLs analyses; Summer mortaliy; Genetic; SNPs; Crassostrea gigas; Oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3351.pdf
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Effect of age and environment on the summer mortality in cupped oyster Crassostrea gigas during the first two years ArchiMer
Degremont, Lionel; Boudry, Pierre; Soletchnik, Patrick; Bedier, Edouard; Ropert, Michel; Samain, Jean-francois.
Three successive generations were produced between 2001 and 2003 to assess to what extent genetic variability exists for this trait in juvenile oysters Crassostrea gigas. For each generation, two groups were selected for their high ("R" for resistant) and low ("S" for susceptible) survival. Significant differences of mortality were observed during the first year in Rivière d'Auray (RA) (Brittany-France). However, low and similar mortality were observed for both groups, with no significant difference between groups in the first and second generation in this site, where the first summer is the critical sensitive period with a clear age effect. In Baie des Veys (BDV) (Normandie-France), where mortalities usually mainly affect adults, mortality between...
Tipo: Text Palavras-chave: Genetic variability; Genetic; Summer mortality; Crassostrea gigas; Pacific oysters.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3442.pdf
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Effects of age and environment on survival of summer mortality by two selected groups of the Pacific oyster Crassostrea gigas ArchiMer
Degremont, Lionel; Boudry, Pierre; Ropert, Michel; Samain, Jean-francois; Bedier, Edouard; Soletchnik, Patrick.
This study investigated the effects of age (first or second summer of life) and environment (three study sites on French coasts) on summer mortality in Crassostrea gigas, using three generations of oysters produced during the Morest project. For each generation, two groups of oysters, selected either as 'resistant' (R) or 'susceptible' (S) to summer mortality at the age of 6 months in Rivière d'Auray (RA, South Brittany), were evaluated. In Ronce (Marennes-Oléron Bay) and RA, R oysters had low mortality during their first and second summers, while mortality was higher during the second summer in Baie des Veys (BDV, Normandy). In RA, S oysters exhibited higher mortality during their first summer than during their second, while the opposite result was found...
Tipo: Text Palavras-chave: Summer mortality; Age; Environment; Genetic; Crassostrea gigas.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/2009/publication-6972.pdf
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Effects of genetic drift and selection at larval stage resulting from hatchery practices in the Pacific oyster (Crassostrea gigas) ArchiMer
Taris, Nicolas; Sauvage, Christopher; Ernande, Bruno; Batista, Frederico; Boudry, Pierre.
Hatchery techniques are now well handled in an increasing number of aquaculture species. However, unintentional effects of domestication often remain poorly documented. In this context, we studied how current hatchery practices may genetically influence larval traits for which significant genetic variation had previously been reported in the Pacific oyster. Two main factors were studied: culling (i.e. discarding the smallest larvae) and rearing temperature (26°C versus 20°C). In parallel, we estimated genetic diversity of broodstock populations sampled in French hatcheries. Finally, we compared larval development and settlement success in the progeny of one of these hatchery broodstock, which had been selected for seven generations, with those of wild...
Tipo: Text Palavras-chave: Genetic drift; Selection; Genetic; Crassostrea gigas; Oysters; Hatchery techniques.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3362.pdf
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Establishment of a genetic map in the European flat oyster Ostrea edulis L. ArchiMer
Lallias, Delphine; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic from European coasts, Atlantic and Mediterranean. It has been exploited since Roman times in Europe. But its production decreased from around 20000 tons in the 1950ies to 1500 tons nowadays because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer initiated a program of selection to produce families of oysters tolerant to Bonamia. In this context, a further step is to identify QTLs of resistance to this parasite. Therefore, a genetic map is first now being built. The establishment of a genetic linkage map will represent the basement for the mapping of QTLs, with the ultimate objective to implement marker-assisted selection in O....
Tipo: Text Palavras-chave: Genetic map; Ostrea edulis; Genetic; European flat oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3472.pdf
Registros recuperados: 97
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