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On the relationship between the load and the variance of relative fitness

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Author(s): Shnol Emmanuil | Ermakova Elena | Kondrashov Alexey

Journal: Biology Direct
ISSN 1745-6150

Volume: 6;
Issue: 1;
Start page: 20;
Date: 2011;
Original page

ABSTRACT
Abstract Background Operation of natural selection can be characterized by a variety of quantities. Among them, variance of relative fitness V and load L are the most fundamental. Results Among all modes of selection that produce a particular value V of the variance of relative fitness, the minimal value L min of load L is produced by a mode under which fitness takes only two values, 0 and some positive value, and is equal to V/(1+V). Conclusions Although it is impossible to deduce the load from knowledge of the variance of relative fitness alone, it is possible to determine the minimal load consistent with a particular variance of relative fitness. The concept of minimal load consistent with a particular biological phenomenon may be applicable to studying several aspects of natural selection. Reviewers The manuscript was reviewed by Sergei Maslov, Alexander Gordon, and Eugene Koonin.
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