Effect of ploidy on the mortality of Crassostrea gigas spat caused by OsHV-1 in France using unselected and selected OsHV-1 resistant oysters

Type Article
Date 2016-03
Language English
Author(s) Degremont LionelORCID1, Ledu Christophe1, Maurouard Elise1, Nourry Max2, Benabdelmouna Abdellah1
Affiliation(s) 1 : IFREMER, LGPMM, SG2M, Ave Mus Loup, F-17390 La Tremblade, France.
2 : IFREMER, LSPC, SG2M, Bouin, France.
Source Aquaculture Research (1355-557X) (Wiley-blackwell), 2016-03 , Vol. 47 , N. 3 , P. 777-786
DOI 10.1111/are.12536
WOS© Times Cited 10
Keyword(s) diploid, triploid, mortality, Crassostrea gigas, ostreid herpesvirus OsHV-1
Abstract 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.
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Degremont Lionel, Ledu Christophe, Maurouard Elise, Nourry Max, Benabdelmouna Abdellah (2016). Effect of ploidy on the mortality of Crassostrea gigas spat caused by OsHV-1 in France using unselected and selected OsHV-1 resistant oysters. Aquaculture Research, 47(3), 777-786. Publisher's official version : https://doi.org/10.1111/are.12536 , Open Access version : https://archimer.ifremer.fr/doc/00199/31028/