Telomere-to-telomere gapless genome assemblies of Coreius heterodon and Coreius guichenoti

<p dir="ltr"><i>Coreius heterodon</i> and <i>Coreius guichenoti</i> are endemic cyprinid fishes of the upper Yangtze River Basin. <i>C. guichenoti</i> is classified as Endangered (EN) by the IUCN and listed as a national second-class protected wild animal in China, whereas <i>C. heterodon</i> is classified as Not Evaluated (NE) by the IUCN. However, genomic resources for these species have remained limited, constraining evolutionary and conservation genetic studies.

Here, we present near telomere-to-telomere genome assemblies for both species. The assemblies span 1.09 Gb for <i>Coreius heterodon</i> and 1.08 Gb for <i>Coreius guichenoti</i>, with contig N50 values of 43.10 Mb and 42.62 Mb, respectively, and are anchored to 25 chromosomes. Repetitive elements account for approximately 58% of each genome, and 25,876 and 25,778 protein-coding genes were annotated, respectively.