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Registros recuperados: 4
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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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Mapping QTL for resistance to summer mortality in the Pacific oyster Crassostrea gigas ArchiMer
Sauvage, Christopher; Heurtebise, Serge; De Koning, D.; Haley, Chris; Boudry, Pierre; Lapegue, Sylvie.
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). Such selective breeding would strongly benefit from the identification of markers associated to the resistance to allow the development of markers assisted selection. Recently, a set of a new kinds of markers (SNPs) have been developed in the Pacific oyster. These markers were identified and characterized in several genes involved in the immune response and energetic pathways (Sauvage, 2007). In this context, the mapping of SNPs, of 16 new EST-SSR based markers and of...
Tipo: Text Palavras-chave: Mortality; Genetic; Crassostrea gigas; Pacific oyster; Mapping QTL.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-3504.pdf
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QTL mapping for resistance to bonamiosis in the European flat oyster Ostrea edulis ArchiMer
Lallias, Delphine; Beaumont, Andy; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Lapegue, Sylvie.
A breeding programme has been undertaken by Ifremer to produce selected Ostrea edulis families which are resistant to Bonamia ostreae, a parasite which is the most significant constraint on aquaculture of this oyster. Using such families, we aimed to identify Quantitative Trait Loci (QTLs) of resistance/susceptibility to bonamiosis. We used an F2 family derived from a bi-parental cross between a wild oyster and an individual from one of the selected oyster families. A total of 550 F2 individuals from the family cohabited with wild oysters that were injected with the parasite. Mortality was checked daily over six months and heart smears were used on moribund or dying oysters to detect the presence and level of infection of the parasite. Ninety two F2...
Tipo: Text Palavras-chave: QTLs; Flat oyster; Ostrea edulis; Bonamia ostreae; Genetic; QTL.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-3726.pdf
Registros recuperados: 4
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