Data from: The genetic architecture of freezing tolerance varies across the range of Arabidopsis thaliana

The capacity to tolerate freezing temperatures limits the geographical
distribution of many plants, including several species of agricultural
importance. However, the genes involved in freezing tolerance remain
largely unknown. Here, we describe the variation in constitutive freezing
tolerance that occurs among worldwide accessions of Arabidopsis thaliana.
We found that although plants from high latitudes tend to be more freezing
tolerant than plants from low latitudes, the environmental factors that
shape cold adaptation differ across the species range. Consistent with
this, we found that the genetic architecture of freezing tolerance also
differs across its range. Conventional genome-wide association studies
helped identify a priori and other promising candidate genes. However,
simultaneously modelling climate variables and freezing tolerance together
pinpointed other excellent a priori candidate genes. This suggests that if
the selective factor underlying phenotypic variation is known, multi-trait
mixed models may aid in identifying the genes that underlie adaptation.