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Author (up) Dowling, D.K.; Friberg, U.; Arnqvist, G. url  doi
openurl 
  Title A comparison of nuclear and cytoplasmic genetic effects on sperm competitiveness and female remating in a seed beetle Type Journal Article
  Year 2007 Publication Journal of Evolutionary Biology Abbreviated Journal J Evol Biol  
  Volume 20 Issue 6 Pages 2113-2125  
  Keywords Animals; Beetles/genetics/*physiology; Cell Nucleus/*genetics; Crosses, Genetic; Cytoplasm/*genetics; Female; Male; Spermatozoa/*metabolism  
  Abstract It is widely assumed that male sperm competitiveness evolves adaptively. However, recent studies have found a cytoplasmic genetic component to phenotypic variation in some sperm traits presumed important in sperm competition. As cytoplasmic genes are maternally transmitted, they cannot respond to selection on sperm and this constraint may affect the scope in which sperm competitiveness can evolve adaptively. We examined nuclear and cytoplasmic genetic contributions to sperm competitiveness, using populations of Callosobruchus maculatus carrying orthogonal combinations of nuclear and cytoplasmic lineages. Our design also enabled us to examine genetic contributions to female remating. We found that sperm competitiveness and remating are primarily encoded by nuclear genes. In particular, a male's sperm competitiveness phenotype was contingent on an interaction between the competing male genotypes. Furthermore, cytoplasmic effects were detected on remating but not sperm competitiveness, suggesting that cytoplasmic genes do not generally play a profound evolutionary role in sperm competition.  
  Address Animal Ecology/Department of Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden. damiankd@cyllene.uwa.edu.au  
  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:17956382 Approved no  
  Call Number WNEC @ jrocheleau @ Serial 30  
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