The genome of Draba nivalis shows signatures of adaptation to the extreme environmental stresses of the Arctic.

ABSTRACT: The Arctic is one of the most extreme terrestrial environments on the planet. Here, we present the first chromosome-scale genome assembly of a plant adapted to the high Arctic, Draba nivalis (Brassicaceae), an attractive model species for studying plant adaptation to the stresses imposed by this harsh environment. We used an iterative scaffolding strategy with data from short-reads, single-molecule long reads, proximity ligation data, and a genetic map to produce a 302 Mb assembly that is highly contiguous with 91.6% assembled into eight chromosomes (the base chromosome number). To identify candidate genes and gene families that may have facilitated adaptation to Arctic environmental stresses, we performed comparative genomic analyses with nine non-Arctic Brassicaceae species. We show that

SUBMITTER: Nowak MD 

PROVIDER: S-EPMC7983928 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature