Fig. 2

Dominant gene expression level correlates with final rosette size. A Heatmap showing the average expression of each dominant gene cluster (K-means) in each sample, sorted into F₁s and inbred parental lines, and arranged by ascending final rosette size. Clusters 1–5 showed no clear expression-size association. Cluster 6 (n = 107) showed a positive association, and clusters 7–13 (n = 151) showed a negative association B Linear-mixed-model spline fitting of exemplary clusters. Top: cluster 6, which showed positive expression-size association; bottom: cluster 7, which showed negative expression-size association; points: cluster mean expression in each sample; shaded area: 95% Bayesian credible intervals. The systematic differences in expression levels across the entire rosette-size range seen in F₁ hybrids are consistent with F₁s being larger than parents