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Author (up) Dowling, D.K.; Nowostawski, A.L.; Arnqvist, G. url  doi
openurl 
  Title Effects of cytoplasmic genes on sperm viability and sperm morphology in a seed beetle: implications for sperm competition theory? Type Journal Article
  Year 2007 Publication Journal of Evolutionary Biology Abbreviated Journal J Evol Biol  
  Volume 20 Issue 1 Pages 358-368  
  Keywords Adaptation, Physiological/*genetics; Animals; Beetles/*genetics/physiology; Crosses, Genetic; DNA, Mitochondrial/*genetics; *Genetic Variation; Inheritance Patterns/genetics; Male; Spermatozoa/*cytology/*physiology  
  Abstract Sperm competition theory predicts that sperm traits influencing male fertilizing ability will evolve adaptively. However, it has been suggested that some sperm traits may be at least partly encoded by mitochondrial genes. If true, this may constrain the adaptive evolution of such traits because mitochondrial DNA (mtDNA) is maternally inherited and there is thus no selection on mtDNA in males. Phenotypic variation in such traits may nevertheless be high because mutations in mtDNA that have deleterious effects on male traits, but neutral or beneficial effects in females, may be maintained by random processes or selection in females. We used backcrossing to create introgression lines of seed beetles (Callosobruchus maculatus), carrying orthogonal combinations of distinct lineages of cytoplasmic and nuclear genes, and then assayed sperm viability and sperm length in all lines. We found sizeable cytoplasmic effects on both sperm traits and our analyses also suggested that the cytoplasmic effects varied across nuclear genetic backgrounds. We discuss some potential implications of these findings for sperm competition theory.  
  Address Animal Ecology/Department of Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden. damian.dowling@ebc.uu.se  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1010-061X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:17210029 Approved no  
  Call Number ASU @ Lara.Ferry @ Serial 38  
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