Museum genomics of reveals temporal genetic stasis and global genetic diversity in Arabidopsis thaliana

Global patterns of genetic diversity through time offer a window into evolutionary processes that maintain diversity. Over time, lineages may expand or contract their distribution, causing turnover in population genetic composition. At individual loci, drift, environmental changes, and purifying selection may affect allele frequencies. Museum specimens of widely distributed species offer a unique window into genetic composition of understudied populations and changes over time. Here, we sequenced genomes of 130 herbarium specimens and 91 new field collections of Arabidopsis thaliana and combined these with published genomes. We sought a broader view of genomic diversity across the species, and to test if population genomic composition is changing through time. Using herbarium specimen sequences, we documented extensive and previously uncharacterized diversity in a range of populations in Africa, populations that are under threat from anthropogenic climate change. Through time, we did no..., , , # Museum genomics of reveals temporal genetic stasis and global genetic diversity in Arabidopsis thaliana

[https://doi.org/10.5061/dryad.31zcrjdz1](https://doi.org/10.5061/dryad.31zcrjdz1)

## Description of the data and file structure

This contains SNP data for the project. One file contains SNPs filtered for missingness used for population structure and another contains those used for temporal allele frequency change (using essentially a GWAS with year of collection as the 'phenotype'.

### Files and variables

#### File: stem_out_GWAS.zip

**Description:**  SNPs filtered for missingness used for temporal allele frequency change analysis. Includes the three standard PLINK type formatted files, stem_out_GWAS.bed, stem_out_GWAS.bim, and stem_out_GWAS.fam. These can be read in using the PLINK software.

#### File: stem_outLowMiss_allrange.zip

**Description:** SNPs filtered for missingness used for population structure. Includes the three standard PLINK type formatted files, stem_outLo...,