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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Article Addendum: The paradox of clonality and the evolution of self-incompatibility
Author(s): Vallejo-Marín, Mario
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Keywords: asexual reproduction
mating system
pollen limitation
reproductive assurance
reproductive compensation
Issue Date: Jul-2007
Date Deposited: 10-Sep-2012
Citation: Vallejo-Marín M (2007) Article Addendum: The paradox of clonality and the evolution of self-incompatibility. Plant Signaling and Behavior, 2 (4), pp. 265-266.;
Abstract: In the January issue of New Phytologist Vallejo-Marín and O’Brien documented that in the genus Solanum (Solanaceae) clonality and self-incompatibility, a common genetic mechanism enforcing cross-fertilization, co-occur more often than expected by chance. Using a phylogenetic approach the authors showed that the statistical association between clonality and self-incompatibility persists even after taking into account phylogenetic relationships among species, uncertainty in the phylogenetic reconstruction, and associations between clonality and life history (annual/perennial). Vallejo-Marín and O’Brien suggest that clonality and self-incompatibility tend to co-occur because clonality, by allowing the persistence and propagation of a genotype in environments with limited pollinator or mate availability, reduces the selective pressure favoring the breakdown of self-incompatibility. In addition to promoting the maintenance of self-incompatibility, when clonality results in the spatial aggregation of genetically identical individuals, clonality may promote its breakdown by restricting pollen transfer between different genotypes. Here I call attention to these contradictory predictions of the effects of clonality on the evolution of self-incompatibility, and suggest that the outcome of this paradox depend on both the extent to which clonal propagation compensates for limited seed production, and on the extent to which clonality reduces pollen transfer between genotypes.
DOI Link: 10.4161/psb.2.4.3872
Rights: Publisher is open-access. Open access publishing allows free access to and distribution of published articles where the author retains copyright of their work by employing a Creative Commons attribution licence. Proper attribution of authorship and correct citation details should be given. Publisher’s policy available from Published in Plant Signaling and Behavior by Landes Bioscience. The original publication is available at
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