Genetic improvement is a strategy for controlling some diseases in aquaculture. The aims of this study were to estimate (co) variance components for body weight and survival in the Pacific white shrimp in a pond affected by a natural outbreak of WSSV, and to compare these estimates with those obtained from a pond where no WSSV was present. Additive genetic variance component for body weight was smaller in the presence of WSSV (1.47±1.86) than in the pond with no WSSV (3.16±0.99). An increase in body weight residual variance was observed in the pond affected by WSSV. Survival additive genetic variance component estimated in the pond affected by WSSV (0.006±0.003) was larger than that estimated in the unaffected one (0.0003±0.002). Results suggest that selection response for body weight and survival at harvesting in the presence of WSSV would be very small.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetics of Trait Complexes: Disease resistance (Posters), , 547, 2014
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