Genetic analysis of disease resistance to Vibrio harveyi by challenge test in Chinese tongue sole (Cynoglossus semilaevis)

文献类型： 外文期刊

第一作者： Li, Yangzhen

作者： Li, Yangzhen;Wang, Lei;Yang, Yingming;Li, Xue;Dai, Huan;Chen, Songlin;Li, Yangzhen;Chen, Songlin;Li, Yangzhen;Wang, Lei;Yang, Yingming;Li, Xue;Dai, Huan;Chen, Songlin

作者机构：

关键词： Genetic parameters; Disease resistance; Genetic correlation; Heritability; Vibrio harveyi; Cynoglossus semilaevis

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2019 年 503 卷

页码：

收录情况： SCI

摘要： Recently, Vibrio harveyi has emerged as an important pathogenic disease with a high mortality rate (50%-70%) in Chinese tongue sole. The aim of this study was to estimate genetic parameters for resistance to V. harveyi in Chinese tongue sole and to evaluate the genetic correlation between resistance and growth traits (i.e. body weight and total length) (involving 50 full-sib families and 8547 individuals). Longitudinal linear models and cross-sectional threshold models were fitted by using different trait definitions (binary and categorical). After a 14-day test, the overall challenge test survival was 57.86% (ranging from 9.30% to 94.30% in families). The heritabilities of survival were ranging from 0.11 to 0.28, estimates obtained by linear models were higher than threshold models. The genetic correlations between resistance (binary and categorical traits) and two growth traits were moderately positive (0.27-0.51). Very high Pearson and Spearman correlations (0.99 to 1) of full-sib family EBVs between different models were all close to unity which might reveal the similar predictive ability of the four models. The favourable heritabilities and moderate positive genetic correlations indicate that joint genetic improvement of vibriosis resistance and growth performance would be feasible. Statement of relevance: This paper offers guidelines to disease-resistance selective breeding strategies in Chinese tongue sole.

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