Kleven, O. | Search bioRxiv

bioRxiv2026

A chromosome-level genome assembly of an endangered large carnivore, the wolverine, Gulo gulo gulo (Linnaeus, 1758)

We describe a chromosome-level, haplotype-resolved genome assembly from a male wolverine (Gulo gulo gulo). The assembly comprises two pseudo-haplotypes of 2,523.2 Mb and 2,288.4 Mb, with 95.8% and 97.8% scaffolded into 20 autosomal chromosomes and sex chromosomes (placed in haplotype one). Assembly completeness is high (BUSCO 98.2% and 88.9%), with 20,337 and 17,692 annotated protein-coding genes for haplotypes one and two, respectively. Compared to existing wolverine genomes, the current genome is more complete and contains both sex chromosomes. This reference genome will be an important resource for population studies and conservation biology of this large carnivore.

genomics↗

bioRxiv2020

Complex population structure of the Atlantic puffin revealed by whole genome analyses

The factors underlying gene flow and genomic population structure in vagile seabirds are notoriously difficult to understand due to their complex ecology with diverse dispersal barriers and extensive periods at sea. Yet, such understanding is vital for conservation management of seabirds that are globally declining at alarming rates. Here, we elucidate the population structure of the Atlantic puffin (Fratercula arctica) by assembling its reference genome and analyzing genome-wide resequencing data of 72 individuals from 12 colonies. We identify four large, genetically distinct clusters, observe isolation-by-distance between colonies within these clusters, and obtain evidence for a secondary contact zone. These observations disagree with the current taxonomy, and show that a complex set of contemporary biotic factors impede gene flow over different spatial scales. Our results highlight the power of whole genome data to reveal unexpected population structure in vagile marine seabirds and its value for seabird taxonomy, evolution and conservation.

genomics↗