Fig. 4

The effect of single and multi-locus contributions to heterosis. The scatter plot shows all 390,000 individuals, indicating the relationship between the sum of all individual locus effects on heterosis (x-axis) and multi-locus effects (y-axis). Multi-locus effects were calculated as the difference between overall heterosis and the sum of all individual locus effects. The distributions of the two variables are shown above and to the right of the plot. Individuals in red show positive heterosis, that is, a rate of biomass production greater than the average of the two parents