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Journal of Heredity Advance Access published online on August 5, 2008
Journal of Heredity, doi:10.1093/jhered/esn058
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© The American Genetic Association. 2008. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Perspective

Adaptation from Leaps in the Dark

Ronny C. Woodruff, and Mingcai Zhang

From the Department of Biological Sciences, Bowling Green State University, Bowling Green, OH 43403, USA

Address correspondence to R. C. Woodruff at the address above, or e-mail: rwoodru{at}bgnet.bgsu.edu.

Although many adaptations occur by selection of beneficial alleles transformed from neutral or deleterious standing variation, new identical mutant alleles that arise as premeiotic clusters have an increased probability of fixation that can rise to the levels that are similar to the fixation of standing variation. Hence, the evidence is still out on the proportion of adaptations that use preexisting variation and new mutations.

Key Words: adaptation • fixations • mutation • standing genetic variation

Corresponding Editor: James N. Thompson

Received April 18, 2008
Revised June 26, 2008

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