DATA: Environmental variables and genetic data of Iberian Arabidopsis thaliana accessions. The file has four sheets including the following information: Sheet #1. Environmental variables (11 variables) included in the analyses (279 accessions): 1st row: Variable type (accession, geography, environment, vegetation and soil). 2nd row: Variable name. 1st column (A): Count. 2nd column (B): Accession code. 3rd to 13th column (C-M): Data. Note: See text for details on SI units and website sources. Note: Decimal separator indicated by a comma. Sheet #2. Genetic data: STRUCTURE clusters (nuclear SNPs), chlorotype groups (citoplasmatic SNPs) and Obligate vernalization treatment (OVR) data (279 accessions): 1st row: Genetic unit names (Accession, Structure, Chlorotype, OVR). 2nd row: Units. 1st column (A): Count. 2nd column (B): Accession code. 3rd to 8th column (C-H): Data. Note: Decimal separator indicated by a comma. Sheet #3. SNP data (250 polymorphic nuclear SNPs; 279 accessions): 1st row: SNP. 2nd row: SNP code. 1st column (A): Count. 2nd column (B): Accession code. 3rd to 252nd column (C-IR): Nucleotide (A, C, G or T). Note: All loci are homozygous. Missing data = empty cell. Sheet #4. Citoplasmatic SNP data (15 polymorphic SNPs; 181 accessions): 1st row: SNP. 2nd row: SNP code. 1st column (A): Count. 2nd column (B): Accession code. 3rd to 17th column (Q): Nucleotide (A, C, G or T).