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Effects of cytoplasmic genes on sperm viability and sperm morphology in a seed beetle: implications for sperm competition
 

Summary: Effects of cytoplasmic genes on sperm viability and sperm
morphology in a seed beetle: implications for sperm competition
theory?
D. K. DOWLING, A. LARKESON NOWOSTAWSKI & G. ARNQVIST
Animal Ecology/Department of Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
Introduction
The mitochondrial genome is generally regarded as a
passive bystander in adaptive evolution (Rand, 2001).
However, recent empirical advances have demonstrated
that this assumption may not be valid (reviewed in
Ballard & Whitlock, 2004; Ballard & Rand, 2005). For
instance, it has been demonstrated that cytoplasmic
(probably mitochondrial) genes are involved in epistatic
interactions with nuclear genes, and that these interac-
tions influence genetic variation in fitness components
(e.g. Rand et al., 2001; James & Ballard, 2003; Zeyl et al.,
2005). Further, recent theory suggests that such interac-
tions may maintain within-population genetic poly-
morphism in mitochondrial/cytoplasmic genes (Rand
et al., 2001).

  

Source: Arnqvist, Göran - Department of Animal Ecology, Uppsala Universitet
Dowling, Damian - School of Biological Sciences, Monash University

 

Collections: Biology and Medicine; Environmental Sciences and Ecology