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Paternity in two-donor crosses (mean ± s.e. proportion of offspring sired by the first male) as a function of time between pollinations in Silene latifolia. Six female plants were hand-pollinated for each time interval. Asterisks denote significant (P < 0·05) deviations from equal paternity in Wilcoxon signed rank test (dashed line = equal paternity). Different letters denote time intervals that differed significantly (P < 0·05) in pairwise post-hoc tests (see Materials and Methods).
