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Evolutionary dynamics of extranuclear genes

Published online by Cambridge University Press:  14 April 2009

N. Takahata  and
M. Slatkin
N. Takahata
Affiliation:
Department of Zoology, NJ-15, University of Washington, Seattle, Wa 98195USA
M. Slatkin
Affiliation:
Department of Zoology, NJ-15, University of Washington, Seattle, Wa 98195USA
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Summary

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We studied the evolutionary dynamics of extranuclear genes taking into account simple kinds of selection, two modes of inheritance and the multiplicity of genomes within a cell. Particular attention was paid to the accumulation of advantageous or deleterious mutations in an extranuclear genome. Within-generation drift due to multiplicity of genome and non-Mendelian segregation promotes the fixation of advantageous mutations and prevents deleterious mutations from accumulating. We show also that the extent of paternal contribution makes little difference in the rate, but, in contrast, the configuration of the genome and the mode of transmission both makes a large difference. These results are compatible with what is known about extranuclear genomes.

Type
Research Article
Information
Genetics Research , Volume 42 , Issue 3 , December 1983 , pp. 257 - 265
Copyright
Copyright © Cambridge University Press 1983

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