Sex ratio variation and spatial segregation of the sexes in populations ofRumex acetosa andR. acetosella (Polygonaceae) |
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| Authors: | Helena Korpelainen |
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| Institution: | (1) Department of Genetics, University of Helsinki, Arkadiankatu 7, SF-00100 Helsinki, Finland |
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| Abstract: | Populations ofRumex acetosa andR. acetosella were studied during two growth seasons. The ramet sex ratios ofR. acetosa were always female-biased. InR. acetosella the sex ratios expressed more variation but were mostly female-biased. In both species the sex ratios commonly varied between subpopulations reflecting a partial spatial segregation of the sexes. No marked differences between sexes in vegetative vigour were detected in either species. Interactions between sex ratios, various soil characteristics and population densities were determined. Possible mechanisms for causing biased sex ratios and partial spatial segregation of the sexes are discussed. |
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| Keywords: | Angiosperms Polygonaceae Rumex acetosa R acetosella Sex ratios spatial segregation of the sexes environmental correlations density effects |
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