The evolution of distyly in Primula vulgaris |
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Authors: | John Piper Brian Charlesworth |
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Institution: | Biology Building, University of Sussex, Falmer, Brighton BN1 9QG;Department of Biology, University of Chicago, E 57th Street, Chicago, Illinois, U.S.A. |
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Abstract: | Experiments on pollen flow and seed production were performed in populations of P. vulgaris in order to examine the roles of selection for reduced self-pollination in a partially self-fertile morph, selection for reduced stigma clogging, selection for a pollen saving effect, and selection for disassortative pollination in the evolution of morphological distyly (reciprocal herkogamy). Selection for reduced self-pollination and disassortative pollination were shown to have a plausible role in the evolution of this dimorphism. Selection for reduced stigma clogging and pollen saving appeared to have no obvious role in the evolution of morphological distyly. |
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Keywords: | Distyly stigma clogging pollen saving disassortative pollination |
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