Document Detail

Mutation accumulation affects male virility in Drosophila selected for later reproduction.
MedLine Citation:
PMID:  17717809     Owner:  NLM     Status:  MEDLINE    
An intensive study of longevity, female fecundity, and male reproductive behavior in Drosophila melanogaster was undertaken in order to establish whether late-life fitness characters in short-lived populations might be affected by the increase in deleterious alleles due to random genetic drift. We also sought to determine whether selection for late-life fertility could eliminate alleles that produce a decline in later fitness components in short-lived populations, as predicted by the mutation accumulation hypothesis for the evolution of aging. These experiments employed long-lived (O) populations, short-lived (B) populations, and hybrids made from crosses of independent lines from within the O and B populations. No detectable longevity differences were seen between hybrid B males and females and purebred B males and females. Reproduction in aged B purebred females was significantly less than in hybrid females at 3 wk of age only. A full diallel cross of the five replicate B lines showed a steady increase in hybrid male reproductive performance after the first week of adult life, relative to the parental lines. A full diallel cross of the five replicate O lines revealed no significant increase in hybrid O age-specific male reproductive success compared with the purebred O lines when assayed over the first 5 wk of adult life. The results on male reproductive behavior are consistent with the idea that relaxed age-specific selection in the B populations has been accompanied by an increase in deleterious, recessive traits that exhibit age-specific expression. Consequently, we conclude that a mutation accumulation process has been at least partly responsible for the age-specific decline in male B virility relative to that of the O populations.
Daniel J Borash; Michael R Rose; Laurence D Mueller
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Publication Detail:
Type:  Journal Article     Date:  2007-07-13
Journal Detail:
Title:  Physiological and biochemical zoology : PBZ     Volume:  80     ISSN:  1522-2152     ISO Abbreviation:  Physiol. Biochem. Zool.     Publication Date:    2007 Sep-Oct
Date Detail:
Created Date:  2007-08-24     Completed Date:  2007-11-06     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  100883369     Medline TA:  Physiol Biochem Zool     Country:  United States    
Other Details:
Languages:  eng     Pagination:  461-72     Citation Subset:  IM    
Department of Ecology and Evolutionary Biology, University of California, Irvine, California 92697-2525, USA.
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MeSH Terms
Age Factors
Aging / genetics
Drosophila melanogaster / genetics*,  physiology*
Fertility / genetics
Genetic Drift
Genetic Variation
Selection, Genetic

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