Description: The global spread of Rattus norvegicus has been shaped by human activity and climate change, with island isolation driving unique evolutionary paths. Understanding population differentiation and adaptive evolution in invasive rodents informs island biodiversity conservation and invasive species management. Through whole-genome resequencing of 38 individuals from Iturup Island and adjacent mainland populations, we will reveal their demographic history and genetic signatures of island adaptation. High-quality SNPs were obtained by mapping to the reference genome followed by quality filtering for population genomic analyses of R. norvegicus. We initially investigated population structure and inferred demographic history. Subsequently, inter-population genetic diversity indices were calculated using sliding window, and genetic load was compared across populations. Divergent selection between mainland and island populations was detected, with identified candidate genes subjected to functional annotation.

Data type: Raw sequence reads

Sample scope: Monoisolate

Release date: 2025-09-02

Last updated: 2025-09-02

Data size: 384.32GB