The first chromosome-level annotated reference genome for Chrosomus eos, the Northern Redbelly Dace

Hybridization amongst teleost fish species is an ongoing phenomenon with unclear implications Chrosomus eos, the Northern Redbelly Dace, is a species with an especially complex and fascinating history of hybridization with the closely related species Chrosomous neogaeus, the finescale dace. The two species historically hybridized during the last glacial maximum, forming a rare unisexual F1 hybrid lineage that utilizes gynogenetic reproduction. All three maintain sympatric relationships, with limited evidence suggesting recent or contemporary hybridization between the parental species. To date, genomic work on this hybrid complex has been constrained by the lack of reference genomes available for either species. To enable future research, a novel, high-quality, chromosome-level genome was sequenced and analyzed for completeness and the syntenic relationship between itself and the high-quality, well-cited zebrafish Danio rerio genome.