Fig. 4

Oyster families produced from broodstocks surviving POMS challenge are more disease resistant. Mortalities of the different families after exposure to POMS in the different infection trials were analysed by origin of the broodstocks (farming/high biomass, and non-farming/low biomass area or mass selection program). Significant differences between conditions are indicated by different lowercase letters (different letters indicate significant difference, a, b or c; Mann-Whitney U test, p < 0.05)