Simulating the evolution of a clonal trait in plants with sexual and vegetative reproduction

Fischer, Markus; Winkler, Eckart; Schmid, Bernhard (2008). Simulating the evolution of a clonal trait in plants with sexual and vegetative reproduction. Journal of Plant Ecology, 1(3), pp. 161-171. Oxford: Oxford University Press 10.1093/jpe/rtn016

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Aims Phenotypic optimality models neglect genetics. However, especially when heterozygous genotypes ire fittest, evolving allele, genotype and phenotype frequencies may not correspond to predicted optima. This was not previously addressed for organisms with complex life histories. Methods Therefore, we modelled the evolution of a fitness-relevant trait of clonal plants, stolon internode length. We explored the likely case of air asymmetric unimodal fitness profile with three model types. In constant selection models (CSMs), which are gametic, but not spatially explicit, evolving allele frequencies in the one-locus and five-loci cases did not correspond to optimum stolon internode length predicted by the spatially explicit, but not gametic, phenotypic model. This deviation was due to the asymmetry of the fitness profile. Gametic, spatially explicit individual-based (SEIB) modeling allowed us relaxing the CSM assumptions of constant selection with exclusively sexual reproduction. Important findings For entirely vegetative or sexual reproduction, predictions. of the gametic SEIB model were close to the ones of spatially explicit CSMs gametic phenotypic models, hut for mixed modes of reproduction they appoximated those of gametic, not spatially explicit CSMs. Thus, in contrast to gametic SEIB models, phenotypic models and, especially for few loci, also CSMs can be very misleading. We conclude that the evolution of trails governed by few quantitative trait loci appears hardly predictable by simple models, that genetic algorithms aiming at technical optimization may actually, miss the optimum and that selection may lead to loci with smaller effects, in derived compared with ancestral lines.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology 08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
UniBE Contributor:	Fischer, Markus
ISSN:	1752-9921
Publisher:	Oxford University Press
Language:	English
Submitter:	Peter Alfred von Ballmoos-Haas
Date Deposited:	04 Oct 2013 15:08
Last Modified:	05 Dec 2022 14:21
Publisher DOI:	10.1093/jpe/rtn016
Web of Science ID:	000265790400002
URI:	https://boris.unibe.ch/id/eprint/30115 (FactScience: 171888)