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Interacting mutations promote diversity
Date:6/28/2012

hat frequency-dependent selection leads to higher genetic diversity within a population of individuals even though diversity per se is not favoured. The interaction of different mutations and the emergence of new mutants support the development of dynamic diversity in the population. One mutant does not always need to replace all other mutations or the original population. "It is possible for different mutations to exist in parallel such that a new mutant does not to completely replace the residents," says Weini Huang, lead author of the study. What is particularly interesting is the fact that diversity in this model remains naturally limited.

Fitness, on the other hand, does not necessarily rise with frequency-dependent selection in contrast to constant selection. By way of example, a mutation may arise within cells which halts the production of substances that are passed on to other cells. This can initially be advantageous; however, if it reaches fixation, the average fitness of the cell population declines. Advantageous mutations can thereby be lost and deleterious ones become established.


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Contact: Dr. Arne Traulsen
traulsen@mpil-ploen.mpg.de
49-452-276-3255
Max-Planck-Gesellschaft
Source:Eurekalert

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