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- W2330060244 abstract "Heterostyly has been viewed as both an antiselfing device and a mechanism that increases the proficiency of pollen transfer between plants. We used experimental manipulation of the morph structure of garden populations of self‐compatible, tristylous Eichhornia paniculata to investigate the function of floral polymorphism. Outcrossing rates (t), levels of intermorph mating (d), and morph‐specific male and female reproductive success were compared in replicate trimorphic and monomorphic populations. In trimorphic populations, t and d averaged 0.81 (2 SE = 0.03) and 0.77 (2 SE = 0.03) respectively, with no difference in either parameter among morphs. Ninety‐five percent of outcrossed seeds were therefore the result of intermorph fertilizations. Male reproductive success of the long‐styled morph was low, especially in comparison with plants of the short‐styled morph. Outcrossing rates for each morph were higher in trimorphic than monomorphic populations where t averaged 0.71 (2 SE = 0.01), 0.30 (2 SE = 0.04) and 0.43 (2 SE = 0.1) for the long‐, mid‐, and short‐styled morphs, respectively. Seed set was lower in monomorphic populations, particularly those composed of the L morph, reflecting reduced pollen deposition. Floral polymorphism therefore increased both outcrossing rate and fecundity but the magnitude of the differences varied among morphs. If the ancestral condition in heterostylous groups resembled the L morph, as has been suggested, data from this study suggests that the selective basis for the establishment of floral polymorphism could have been increased pollen transfer rather than higher levels of outcrossing." @default.
- W2330060244 created "2016-06-24" @default.
- W2330060244 creator A5024169467 @default.
- W2330060244 creator A5083109105 @default.
- W2330060244 date "1992-02-01" @default.
- W2330060244 modified "2023-10-02" @default.
- W2330060244 title "EXPERIMENTAL STUDIES ON THE FUNCTIONAL SIGNIFICANCE OF HETEROSTYLY" @default.
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- W2330060244 doi "https://doi.org/10.1111/j.1558-5646.1992.tb01983.x" @default.
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