Picocyanobacteria Antarctica

This dataset is additional materials for the study "Out of Antarctica: new insights into Antarctic Subcluster 5.2 picocyanobacteria based on high-quality genomes ". On this study, we increased the genomic representation of polar taxa in subcluster 5.2 (picocyanobactria) by reconstructing new high-quality genomes from five Antarctic lacustrine strains and one Arctic freshwater isolate using a combination of small Illumina and long Nanopore reads. A maximum likelihood (ML) phylogenomic analysis of these new assemblies combined with all publicly available good quality assemblies of the subcluster 5.2 suggests evidence of a dispersal process from Antarctica. Indeed, the topology of the phylogenomic tree indicates one basal Antarctic lineage followed by the emergence of two lineages, one Antarctic and one non-Antarctic (Spain).

本数据集为研究论文《走出南极洲：基于高质量基因组的南极亚簇5.2（Subcluster 5.2）超微蓝细菌（picocyanobacteria）新认知》的补充材料。本研究结合伊卢米纳（Illumina）短读长测序与纳米孔（Nanopore）长读长测序技术，对5株南极湖栖菌株及1株北极淡水分离株进行基因组重建，以此扩充了亚簇5.2超微蓝细菌这一极地类群的基因组代表性。将上述新获得的基因组组装序列与所有公开可用的亚簇5.2高质量基因组组装序列相结合，开展最大似然（ML）系统基因组学分析，结果证实存在从南极洲向外扩散的演化过程。具体而言，系统基因组树的拓扑结构显示存在一个基底南极谱系，随后分化出两个演化支：一支为南极谱系，另一支为非南极谱系（源自西班牙）。