Originally published as Genetics Published Articles Ahead of Print on August 3, 2009.

Genetics, Vol. 183, 747-749, October 2009, Copyright © 2009
doi:10.1534/genetics.109.106005

Point Mutation Rate of Bacteriophage {Phi}X174

* Institut Cavanilles de Biodiversitat i Biologia Evolutiva and Departamento de Genética, Universitat de València, 46071 València, Spain and {dagger} Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, New Jersey 08901

1 Corresponding author: Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, P.O. Box 22085, 46071 València, Spain.
E-mail: rafael.sanjuan{at}uv.es

The point mutation rate of phage {Phi}X174 was determined using the fluctuation test. After identifying the genetic changes associated with the selected phenotype, we obtained an estimate of 1.0 x 10–6 substitutions per base per round of copying, which is consistent with Drake's rule (0.003 mutations per genome per round of copying in DNA-based microorganisms).