Genotype-by-environment interaction for resistance to Edwardsiella tarda under different temperatures in turbot

文献类型： 外文期刊

第一作者： Lyu, Ding

作者： Lyu, Ding;Hu, Yulong;Wang, Weiji;Lyu, Ding;Hu, Yulong;Wang, Weiji

作者机构：

关键词： Turbot; Genotype-by-environment interaction; Edwardsiella tarda; Genetic correlation

期刊名称：AQUACULTURE REPORTS （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN： 2352-5134

年卷期： 2025 年 43 卷

页码：

收录情况： SCI

摘要： Edwardsiellosis caused by Edwardsiella tarda is recognized as one of the most serious bacterial diseases affecting farmed turbot. The occurrence of this disease in actual farming was often accompanied by high water temperatures. To determine whether the genotype-environment interaction (GxE) under different temperatures will limit the realization of genetic gains from selection breeding in practical aquaculture processes, we tested turbot's resistance to E. tarda at both high (21 degrees C) and low (16 degrees C) temperatures, and investigated the GxE for this trait under different temperatures. The mortality under high temperature occurred from 6 to 14 days post infection, while that under low temperature occurred from 11 to 23 days post infection. Using survival days postinfection as the phenotype for resistance to E. tarda, the estimated heritability under high and low water temperatures were 0.16 f 0.06 and 0.54 f 0.11, respectively. The phenotypic and genetic correlations between them were 0.11 f 0.07 and 0.37 f 0.22, respectively. These results suggested that there were an obvious scaling effect and a severe re-ranking effect for resistance to E. tarda in turbot between low and high temperatures. Based on this, we believe that GxE under different temperatures is likely to result in a low genetic correlation between resistance to E. tarda in the case of artificial infection and commercial farming. Therefore, it is necessary to utilize the disease outbreak temperatures in commercial aquaculture environments (19-23 degrees C) as the primary selection environment for E. tarda resistance breeding.

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