FIGURE 1.

Histogram of days to anthesis for the field experiments. The timing of the root pulling events are highlighted and assigned developmental stages relative to flowering: pre-flowering for the pulling at 71–73 days after planting, prior to any lines reaching anthesis, early flowering at 61–66 days after planting when roughly 5% of lines had reached anthesis, mid-flowering at 91–93 days from planting when roughly 30% had reached anthesis, and post-flowering at 109–119 days from planting when 98% of lines had reached anthesis.