FN Archimer Export Format PT J TI Effect of ploidy on the mortality of Crassostrea gigas spat caused by OsHV-1 in France using unselected and selected OsHV-1 resistant oysters BT AF DEGREMONT, Lionel LEDU, Christophe MAUROUARD, Elise NOURRY, Max BENABDELMOUNA, Abdellah AS 1:1;2:1;3:1;4:2;5:1; FF 1:PDG-RBE-SG2M-LGPMM;2:PDG-RBE-SG2M-LGPMM;3:PDG-RBE-SG2M-LGPMM;4:PDG-RBE-SG2M-LSPC;5:PDG-RBE-SG2M-LGPMM; C1 IFREMER, LGPMM, SG2M, Ave Mus Loup, F-17390 La Tremblade, France. IFREMER, LSPC, SG2M, Bouin, France. C2 IFREMER, FRANCE IFREMER, FRANCE SI LA TREMBLADE BOUIN SE PDG-RBE-SG2M-LGPMM PDG-RBE-SG2M-LSPC IN WOS Ifremer jusqu'en 2018 IF 1.461 TC 29 UR https://archimer.ifremer.fr/doc/00199/31028/29427.pdf LA English DT Article DE ;diploid;triploid;mortality;Crassostrea gigas;ostreid herpesvirus OsHV-1 AB The effect of ploidy on the mortality of Crassostrea gigas spat caused by the ostreid herpesvirus (OsHV-1) genotype μVar was investigated at five sites along the Atlantic coast in France in 2011. Sibling diploids and triploids were produced using either unselected or selected OsHV-1-resistant oysters. No significant interactions were found between the factors of environment, genotype and ploidy at the endpoint dates. The mean mortality rates at the sites were 62 and 59% for diploids and triploids, respectively, and the two rates were not significantly different. The mean mortality rates were 33 and 32% for sibling diploids and triploids, respectively, when OsHV-1-resistant parents were used, and 91 and 85%, respectively, when unselected parents were used. The results were confirmed through other broodstocks tested in 2013. Our study is the first to clearly show that mortality related to OsHV-1 is similar between diploids and triploids in C. gigas when the same germplasm is used for both ploidy. Furthermore, OsHV-1 resistance was not substantially altered by triploidization, indicating that the achieved selective breeding of diploid oysters for OsHV-1 resistance can be translated into improved survival in triploids. PY 2016 PD MAR SO Aquaculture Research SN 1355-557X PU Wiley-blackwell VL 47 IS 3 UT 000369162300010 BP 777 EP 786 DI 10.1111/are.12536 ID 31028 ER EF