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Evolution of flowering strategies in Oenothera glazioviana: an integral projection model approach

Rees, M. and Rose, K.E. (2002) Evolution of flowering strategies in Oenothera glazioviana: an integral projection model approach. Proceedings of the Royal Society B: Biological Sciences, 269 (1499). pp. 1509-1515. ISSN 1471-2954


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The timing of reproduction is a key determinant of fitness. Here, we develop parameterized integral projection models of size-related flowering for the monocarpic perennial Oenothera glazioviana and use these to predict the evolutionarily stable strategy (ESS) for flowering. For the most part there is excellent agreement between the model predictions and the results of quantitative field studies. However, the model predicts a much steeper relationship between plant size and the probability of flowering than observed in the field, indicating selection for a 'threshold size' flowering function. Elasticity and sensitivity analysis of population growth rate u and net reproductive rate R0 are used to identify the critical traits that determine fitness and control the ESS for flowering. Using the fitted model we calculate the fitness landscape for invading genotypes and show that this is characterized by a ridge of approximately equal fitness. The implications of these results for the maintenance of genetic variation are discussed.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2002 The Royal Society. Reproduced in accordance with the publisher's self-archiving policy.
Keywords: life history, evolution, size-structured population, evolutionarily stable strategy, delayed reproduction, genetic variation, sensitivity analysis
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield)
Depositing User: Repository Officer
Date Deposited: 26 Jun 2006
Last Modified: 05 Jun 2014 23:51
Published Version: http://www.journals.royalsoc.ac.uk/openurl.asp?gen...
Status: Published
Publisher: The Royal Society
Refereed: Yes
Identification Number: 10.1098/rspb.2002.2037
URI: http://eprints.whiterose.ac.uk/id/eprint/1393

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