Clustering of grain set ratio reflecting silk emergence dynamics. A Grain set ratio (%) as a function of relative position along the ear (%). Ear positions are divided by ear length for easier comparison between ears. Grey lines: one line for each ear in the cluster. Red line: smoothed mean value of each cluster. Black lines: standard deviations from the mean line of each cluster. B Proportions of ears from each treatment (WW = well-watered, WD = water deficit) in the respective clusters (1–5). C Bar plot representing mean values of ear length in centimeters for each cluster, error bar = standard deviation. D Phenotypes of ears representing each cluster.