Experimental Studies of the Evolutionary Significance of Sexual Reproduction. VI. A Greenhouse Test of the Sib-Competition Hypotheses

This study tests the hypothesis that competition among groups of sexual and asexual siblings generates an advantage for sexual females. Individual tillers of Anthoxanthum odoratum were planted singly, among other siblings from the same family, and among groups of sexual and asexual siblings from dif...

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Bibliographic Details
Published in:Evolution 1989-08, Vol.43 (5), p.1066-1074
Main Author: Kelley, Steven E.
Format: Article
Language:English
Subjects:
Anthoxanthum odoratum
Biological and medical sciences
Competition
Ecological competition
Evolution
Family identity
Flowers & plants
Fundamental and applied biological sciences. Psychology
Genetics
Genetics of eukaryotes. Biological and molecular evolution
Genotypes
Lotteries
Pathogens
Plants
Population genetics, reproduction patterns
Pteridophyta, spermatophyta
Reproduction
Sexual reproduction
Siblings
Tillers
Vegetals
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Summary:This study tests the hypothesis that competition among groups of sexual and asexual siblings generates an advantage for sexual females. Individual tillers of Anthoxanthum odoratum were planted singly, among other siblings from the same family, and among groups of sexual and asexual siblings from different families in pots in an unheated greenhouse. Unlike previous field experiments, there was little difference between the performance of sexual and clonal tillers after two years, despite strong treatment effects and high mortality. The results demonstrate that sib competition does not generate an advantage for sexual reproduction in biotically simple environments.
ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.1989.tb02551.x