Gene flow increases fitness at the warm edge of a species' range.

  title={Gene flow increases fitness at the warm edge of a species' range.},
  author={Jason P. Sexton and Sharon Y. Strauss and Kevin J. Rice},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={108 28},
According to theory, gene flow to marginal populations may stall or aid adaptation at range limits by swamping peripheral populations with maladaptive gene flow or by enhancing genetic variability and reducing inbreeding depression, respectively. We tested these contrasting predictions by manipulating patterns of gene flow of the annual plant, Mimulus laciniatus, at its warm range limit. Gene flow was experimentally applied by using crosses within warm-limit populations (selfed and outcrossed… CONTINUE READING
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