| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
First evaluation of resistance to both a California OsHV-1 variant and a French OsHV-1 microvariant in Pacific oysters
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| Autores: |
Divilov, Konstantin
Schoolfield, Blaine
Morga, Benjamin
Dégremont, Lionel
Burge, Colleen A.
Mancilla Cortez, Daniel
Friedman, Carolyn S.
Fleener, Gary B.
Dumbauld, Brett R.
Langdon, Chris
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| Data: |
2019-12
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| Ano: |
2019
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| Palavras-chave: |
Ostreid herpesvirus 1
Crassostrea gigas
Heritability
Breeding
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| Resumo: |
Background Variants of the Ostreid herpesvirus 1 (OsHV-1) cause high losses of Pacific oysters globally, including in Tomales Bay, California, USA. A suite of new variants, the OsHV-1 microvariants (μvars), cause very high mortalities of Pacific oysters in major oyster-growing regions outside of the United States. There are currently no known Pacific oysters in the United States that are resistant to OsHV-1 as resistance has yet to be evaluated in these oysters. As part of an effort to begin genetic selection for resistance to OsHV-1, 71 families from the Molluscan Broodstock Program, a US West Coast Pacific oyster breeding program, were screened for survival after exposure to OsHV-1 in Tomales Bay. They were also tested in a quarantine laboratory in France where they were exposed to a French OsHV-1 microvariant using a plate assay, with survival recorded from three to seven days post-infection. Results Significant heritability for survival were found for all time points in the plate assay and in the survival phenotype from a single mortality count in Tomales Bay. Genetic correlations between survival against the French OsHV-1 μvar in the plate assay and the Tomales Bay variant in the field trait were weak or non-significant. Conclusions Future breeding efforts will seek to validate the potential of genetic improvement for survival to OsHV-1 through selection using the Molluscan Broodstock Program oysters. The lack of a strong correlation in survival between OsHV-1 variants under this study’s exposure conditions may require independent selection pressure for survival to each variant in order to make simultaneous genetic gains in resistance.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00598/70974/69206.pdf
DOI:10.1186/s12863-019-0791-3
https://archimer.ifremer.fr/doc/00598/70974/
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| Editor: |
Springer Science and Business Media LLC
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| Formato: |
application/pdf
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| Fonte: |
Bmc Genetics (1471-2156) (Springer Science and Business Media LLC), 2019-12 , Vol. 20 , N. 1 , P. 96 (9p.)
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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