Molecular phylogenetic relationships between 28 Arabidopsis accessions based on 59 single nucleotide polymorphisms. Genotypes were extracted from http://www.naturalvariation.org/. The evolutionary history was inferred by using the Maximum Likelihood method based on the Tamura-Nei model. The tree with the highest log likelihood (-1257.96) is shown and was generated in MEGA5.2. The tree is drawn to scale, with branch lengths measured in the number of substitutions per site (above the branches). All positions containing gaps and missing data were eliminated. Red shading indicates a capacity for a high frequency of zll-dependent stem cell termination, yellow indicates a medium capacity and green indicates a low capacity.