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Evolution. 2003 Mar;57(3):683-5; discussion 686-9.

Toward a realistic model of mutations affecting fitness.

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University of Edinburgh, Institute of Cell, Animal and Population Biology, West Mains Road, Edinburgh EH9 3JT, United Kingdom.


Analysis of a recent mutation accumulation (MA) experiment has led to the suggestion that as many as one-half of spontaneous mutations in Arabidopsis are advantageous for fitness. We evaluate this in the light of data from other MA experiments, along with molecular evidence, that suggest the vast majority of new mutations are deleterious.

[Indexed for MEDLINE]

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