This study assessed genetic parameters including genotype by diet interactions in growth and survival of Pacific white shrimp (Litopenaeus vannamei) fed with a low-protein and low-fishmeal diet (protein: 35%, fishmeal: 9%) and a general commercial diet (protein: 42%, fishmeal: 25%). A total of 2774 shrimp from 38 families were divided into two groups for a feeding trial, an experimental group fed with the low-protein and low-fishmeal diet and a control one fed with the commercial diet. A 7.06% increase in BW of shrimp fed the control diet over the experimental diet, and no significant difference in survival rate between the diets was observed after 75 days of trial. There was no significant difference between heritability estimate of BW on the experimental diet (0.671 ± 0.119) and that on the control diet (0.585 ± 0.108; p > 0.05), and heritability estimate of survival on the experimental diet (0.199 ± 0.047) was significantly higher than that on the control diet (0.050 ± 0.019; p < 0.01). Genetic correlation between BW recorded on the two diets was very high (0.928 ± 0.042), indicating an insignificant genotype by diet interaction effect for this trait. Relatively, genetic correlation for survival was low (0.251 ± 0.160), indicative of genotype by diet interaction effect. Our results indicate that 35% protein and 9% fishmeal in diets with high level of plant-based protein are feasible in inducing acceptable growth and survival of L. vannamei. This study confirms that the current low-protein and low-fishmeal diet is an appropriate environment for evaluating and selecting genotypes for improved growth of L. vannamei.

中文翻译：

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在低蛋白和低鱼粉饮食使用的背景下深入了解太平洋白虾（Litopenaeus vannamei）生长和生存的遗传潜力

本研究通过饮食相互作用评估了太平洋白对虾 ( Litopenaeus vannamei ) 生长和存活中的遗传参数，包括基因型。) 饲喂低蛋白和低鱼粉饮食（蛋白质：35%，鱼粉：9%）和一般商业饮食（蛋白质：42%，鱼粉：25%）。将来自 38 个科的 2774 只虾分成两组进行喂养试验，一组喂食低蛋白低鱼粉饲料，另一组喂食商业饲料。与实验饲料相比，喂食对照饲料的虾的体重增加了 7.06%，试验 75 天后，未观察到饲料之间的存活率有显着差异。实验饮食 (0.671 ± 0.119) 和对照饮食 (0.585 ± 0.108; p > 0.05），实验饮食的生存遗传力估计值（0.199 ± 0.047）显着高于对照饮食（0.050 ± 0.019；p  < 0.01）。两种饮食记录的体重之间的遗传相关性非常高（0.928±0.042），表明该性状的饮食相互作用影响的基因型不显着。相对而言，生存的遗传相关性较低（0.251±0.160），表明基因型受饮食相互作用影响。我们的研究结果表明，在高水平植物性蛋白质的日粮中添加 35% 的蛋白质和 9% 的鱼粉在诱导L可接受的生长和存活方面是可行的。 南美白. 这项研究证实，目前的低蛋白和低鱼粉饮食是评估和选择基因型以改善L生长的合适环境。 南美白