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Total leaf number within ‘Hort16A’ buds of equivalent developmental stage (as defined by Brundell, 1975). Bud stages are: dormant, D, advanced budbreak, ABB; advanced budbreak plus, ABB+; open cluster, OC; advanced open cluster, AOC; advanced open cluster plus, AOC+. Offset printing is used for overlapping data points. The line shows mean values and standard errors are represented as vertical bars above. Only one sample was at the AOC+ stage, so there is no error bar.
