Low fertility of wild hybrid male flycatchers despite recent divergence.

@article{lund2013LowFO,
  title={Low fertility of wild hybrid male flycatchers despite recent divergence.},
  author={Murielle {\AA}lund and Simone Immler and Amber M Rice and Anna Qvarnstr{\"o}m},
  journal={Biology letters},
  year={2013},
  volume={9 3},
  pages={20130169}
}
Postzygotic isolation may be important for maintaining species boundaries, particularly when premating barriers are incomplete. Little is known about the course of events leading from minor environmental mismatches affecting hybrid fitness to severe genetic incompatibilities causing sterility or inviability. We investigated whether reduced reproductive success of hybrid males was caused by suboptimal sperm traits or by more severe genetic incompatibilities in a hybrid zone of pied (Ficedula… CONTINUE READING
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