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Reinforcement of reproductive isolation between adjacent populations in the Park Grass Experiment

Silvertown, J.; Servaes, C.; Biss, P. and Macleod, D. (2005). Reinforcement of reproductive isolation between adjacent populations in the Park Grass Experiment. Heredity, 95(3) pp. 198–205.

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It has been debated, ever since Charles Darwin and Alfred Russell Wallace disagreed about the matter, whether natural selection plays a role in reinforcing reproductive isolation during the earliest stages of speciation. Recent theory suggests that it can do so, but until now the empirical evidence has conspicuously lacked a case in which reinforcement has actually been observed to split a population. We show that this has occurred at least once in populations of the grass Anthoxanthum odoratum growing in the Park Grass Experiment where flowering time has shifted at the boundaries between plots. As a consequence, gene flow via pollen has been severely limited and adjacent populations that had a common origin at the start of the experiment in 1856 have now diverged at neutral marker loci.

Item Type: Journal Article
ISSN: 1365-2540
Keywords: Anthoxanthum odoratum; Fst; flowering phenology; gene flow; reinforcement; sympatric speciation plant-populations; anthoxanthum-odoratum; physiological differences; mosaic environment; premating isolation; sexual selection; flowering time; evolution; speciation; differentiation
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 2293
Depositing User: Jonathan Silvertown
Date Deposited: 12 Jun 2006
Last Modified: 14 Jan 2016 15:47
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