Interacción genotipo por ambiente en camarón blanco asociada a Síndrome de Mancha Blanca

Abstract

This study aimed to estimate genotype-by-environment interaction for body weight (BW) and survival in presence and absence of White Spot Disease (WSD) in two genetic lines of Penaeus vannamei (Growth GROand resistance to WSD -RES). Heritability for BW in the GRO line was 0.05 ± 0.16 in the presence of WSD and 0.35 ± 0.15 in the absence, while for the RES line they were 0.26 ± 0.07 and 0.49 ± 0.08 in the presence and absence of WSD, respectively. Genetic correlations for BW between environments were -0.17 ± 0.60 for GRO and 0.89 ± 0.09 for RES. Heritability for survival in GRO was 0.01 in both environments and the genetic correlation was not estimable, whereas, for RES, the heritabilities were 0.06 ± 0.04 and 0.11 ± 0.06 in the absence and presence of WSD, respectively, additionally, the genetic correlation was not significant. Although the linear model suggests a genotype-by-environment interaction, the estimates propose independence of the same trait between environments, and the correlations between traits in the resistance line propose to independently select traits when WSD is present.