黄姑鱼低温耐受性的全基因组关联分析
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S 961.6

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浙江省“三农九方”科技协作计划项目(2023SNJF078);浙江省杰出青年基金(LR21C190001);国家自然科学基金(31972785)


Genome-wide association analysis of low temperature tolerance in Nibea albiflora
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    摘要:

    目的 研究黄姑鱼应对低温胁迫的分子机制,为黄姑鱼养殖过程中应对极端低温带来的挑战提供理论参考。方法 本研究以200尾养殖黄姑鱼为实验材料,通过5 °C的低温胁迫,记录每尾实验鱼低温胁迫下的存活时间及体重、体长、性别等表型参数,然后进行全基因组重测序。获得3 005 715个高质量单核苷酸多态性(SNPs)位点,并用于基于混合线性模型(MLM)的EMMAX软件进行全基因组关联分析 (GWAS)。结果 体重、体长及性别等各种表型参数均与耐低温时长不显著相关 (P=0.834~0.013),在24条染色体上定位到9个与耐低温时长显著关联的位点 (P=1.98×10–6~ 4.61×10-8),并注释到CBL.3、STOML2.2、SLC37A3等共13个候选基因。基因功能注释发现,上述基因主要富集在免疫、防御修复、压力应激及线粒体能量代谢等过程,可能与黄姑鱼对低温响应相关。结论 研究结果可为后续黄姑鱼耐低温性状的遗传改良提供参考。

    Abstract:

    Increasing temperature extremes are caused by global climate change. Extreme low temperature has caused the increase of death rate for Nibea albiflora in winter, which has seriously restricted the development of aquaculture industry. N. albiflora is one of the important mariculture fish in China. Studying the molecular mechanism of response to low temperature stress can provide theoretical basis for N. albiflora culture to cope with the challenges of extreme low temperature. In this study, 200 N. albiflora individuals were selected to low-temperature stress at 5 °C, and the survival time, weight, body length, sex and other phenotypic parameters of every individual were recorded. Then, whole genome was resequenced. A total of 3 005 715 high-quality single nucleotide polymorphism (SNPs) sites were obtained by comparing to the reference genome (NCBI GenBank number: GCA_014281875.1), and the obtained SNP sites were used for genome-wide association analysis (GWAS) using the Mixed linear model (MLM) based on EMMAX software. The results showed that the phenotypic parameters such as body weight, body length and sex were not significantly correlated with the low temperature tolerance time (P=0.834-0.013). However, 9 sites were identified on 24 chromosomes that were significantly correlated (P=1.98×10-6- 4.61×10-8) with the low temperature tolerance time, and a total of 13 candidate genes, such as CBL.3, STOML2.2 and SLC37A3 were annotated. Gene ontology (GO) analysis showed that the above genes were mainly enriched in the processes of immunity, defense and repair, stress and mitochondrial energy metabolism, which may be related to low temperature response of the N. albiflora. The results of this study can provide reference for the genetic improvement of low temperature tolerance.

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金鲟,刘炳舰,竺奇慧,张万昌,李完波,王志勇,高天翔,徐冬冬.黄姑鱼低温耐受性的全基因组关联分析[J].水产学报,2025,49(6):069604

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  • 收稿日期:2023-07-11
  • 最后修改日期:2023-11-02
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  • 在线发布日期: 2025-06-09
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