FN Archimer Export Format PT J TI First evaluation of resistance to both a California OsHV-1 variant and a French OsHV-1 microvariant in Pacific oysters BT AF 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 AS 1:1;2:1;3:2;4:2;5:3;6:4;7:5;8:4;9:6;10:1; FF 1:;2:;3:PDG-RBE-SGMM-LGPMM;4:PDG-RBE-SGMM-LGPMM;5:;6:;7:;8:;9:;10:; C1 Department of Fisheries and Wildlife, Coastal Oregon Marine Experiment Station, Oregon State University, Hatfield Marine Science Center, Newport, Oregon, USA Laboratoire de Génétique et Pathologie des Mollusques Marins, Ifremer, La Tremblade, France Institute of Marine and Environmental Technology, University of Maryland Baltimore County, Baltimore, Maryland, USA Hog Island Oyster Co., Marshall, California, USA School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington, USA United States Department of Agriculture-Agricultural Research Service, Hatfield Marine Science Center, Newport, Oregon, USA C2 UNIV OREGON STATE, USA IFREMER, FRANCE UNIV MARYLAND BALTIMORE CTY, USA HOG ISLAND OYSTER CO., USA UNIV WASHINGTON, USA USDA, USA SI LA TREMBLADE SE PDG-RBE-SGMM-LGPMM IN WOS Ifremer UPR DOAJ copubli-int-hors-europe IF 2.567 TC 19 UR https://archimer.ifremer.fr/doc/00598/70974/69206.pdf LA English DT Article DE ;Ostreid herpesvirus 1;Crassostrea gigas;Heritability;Breeding AB 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. PY 2019 PD DEC SO Bmc Genetics SN 1471-2156 PU Springer Science and Business Media LLC VL 20 IS 1 UT 000502726500001 DI 10.1186/s12863-019-0791-3 ID 70974 ER EF