PDF(Pubmed)
Abstract：
The viviparous eelpout Zoarces viviparus is a common fish across the North Atlantic and has successfully colonized habitats across environmental gradients. Due to its wide distribution and predictable phenotypic responses to pollution, Z. viviparus is used as an ideal marine bioindicator organism and has been routinely sampled over decades by several countries to monitor marine environmental health. Additionally, this species is a promising model to study adaptive processes related to environmental change, specifically global warming. Here, we report the chromosome-level genome assembly of Z. viviparus, which has a size of 663 Mb and consists of 607 scaffolds (N50 = 26 Mb). The 24 largest represent the 24 chromosomes of the haploid Z. viviparus genome, which harbors 98% of the complete Benchmarking Universal Single-Copy Orthologues defined for ray-finned fish, indicating that the assembly is highly contiguous and complete. Comparative analyses between the Z. viviparus assembly and the chromosome-level genomes of two other eelpout species revealed a high synteny, but also an accumulation of repetitive elements in the Z. viviparus genome. Our reference genome will be an important resource enabling future in-depth genomic analyses of the effects of environmental change on this important bioindicator species.
摘要：
胎生鱼是横跨东北大西洋的常见鱼类，已成功地在环境梯度上定居了栖息地。由于其广泛的分布和可预测的对污染的表型反应，Z.viviparus被用作生物指示生物，几十年来，几个国家一直定期采样以监测海洋环境健康。此外,该物种是研究与环境变化相关的适应过程的有前途的模型，特别是全球变暖。这里,我们报道了Z.viviparus的染色体水平基因组组装，其具有663兆碱基对(mbp)的大小并且由607个支架(N50=26mbp)组成。最大的24条代表单倍体Z。viviparus基因组的24条染色体，其中包含98％的完整BUSCO定义为鱼鳍鱼，表示程序集是高度连续和完整的。Z.Viviparus装配和另外两个eelpout物种的染色体水平基因组之间的比较分析显示出很高的同系性，但也是Z.viviparus基因组中重复元素的积累。我们的参考基因组将是一个重要的资源，能够在未来对这个重要的生物指示物种的环境变化的影响进行深入的基因组分析。
