PMID: 16637497Apr 28, 2006Paper

Comparative analyses of population structure in two subspecies of Nigella degenii: evidence for diversifying selection on pollen-color dimorphisms

Evolution; International Journal of Organic Evolution
Tove Hedegaard JorgensenStefan Andersson

Abstract

Flower color can be a major determinant of plant fitness, not only because of preferential visitation by pollinators but also because of pleiotropic relationships between the expression of floral pigments and biochemically related compounds that influence vegetative performance variables. Different environments may therefore favor different pigmentation phenotypes. We examined whether spatially varying selection has played a major role in shaping large-scale patterns of differentiation in two subspecies of Nigella degenii (Ranunculaceae), with particular emphasis on pollen color. The two subspecies appear to have been genetically isolated for substantial periods of time and, therefore, provide a "replicated test" for the effect of natural selection. Estimates of population structure based on a suite of floral and vegetative characters were compared with the corresponding data for amplified fragment length polymorphism (AFLP) markers, which were assumed to be selectively neutral. We found low levels of genetic structure within the subspecies using both the AFLP markers (FST < or = 0.05) and quantitative characters (QST < or = 0.15), with no statistically significant differences between the two measures. There is, therefore, no e...Continue Reading

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Citations

Jun 27, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Hans Peter ComesChristiane Bittkau
Jul 16, 2013·The American Naturalist·Christian L Cox, Alison R Davis Rabosky
Mar 28, 2008·Molecular Ecology·Michael C Whitlock
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Jan 1, 2014·Evolution; International Journal of Organic Evolution·Ayco J M TackAnna-Liisa Laine
Nov 22, 2007·Journal of Evolutionary Biology·T LeinonenJ Merilä
Dec 15, 2017·The Journal of Heredity·Kathryn G TurnerLoren H Rieseberg

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