(A) Pie chart with the relative distribution of the PRO2+/INT6+ haplotypes among 840 accessions. The Col-0 haplotype is marked in yellow, haplotypes analyzed as part of this study are marked in green. Haplotypes only represented by a single accession are not included. (B) Number of accessions selected from each of the nine PRO2+/INT6+ groups (average 10, in total 94 accessions). The color code indicates the genetic group membership (k = 9) of every accession as retrieved from the 1001 Genomes ADMIXTURE tool (http://tools.1001genomes.org/) (The 1001 Genomes Consortium, 2016). (C) Geographic distribution of the accessions shown in (B). (D) FLM-β transcript levels of accessions shown in (B) and (C) grouped by the PRO2+/INT6+ haplotype. Similar letters indicate no significant difference of total leaf number (Tukey HSD, p<0.05). (E) Correlation (simple linear regression) between FLM-ß transcript levels as detected in the transgenic analysis and in accessions with identical PRO2+/INT6+ haplotypes from plants grown at 15°C. The PRO2+AAAAC INT6+CAA haplotype, which was removed in Figure 8A, is shown and highlighted with a red arrow. Circle sizes represent the number of accessions analysed of each group as specified in the legend. Horizontal and vertical error bars depict SD of four replicate transgenic line pools or SD of the accessions of each group. Data for the transgenic line analysis were taken from Figure 4E. The grey area indicates the 95% confidence interval.