Selection and genetic (co)variance in bighorn sheep.

  title={Selection and genetic (co)variance in bighorn sheep.},
  author={David W. Coltman and Paul O'Donoghue and John T. Hogg and Marco Festa-Bianchet},
  journal={Evolution; international journal of organic evolution},
  volume={59 6},
Genetic theory predicts that directional selection should deplete additive genetic variance for traits closely related to fitness, and may favor the maintenance of alleles with antagonistically pleiotropic effects on fitness-related traits. Trait heritability is therefore expected to decline with the degree of association with fitness, and some genetic correlations between selected traits are expected to be negative. Here we demonstrate a negative relationship between trait heritability and… CONTINUE READING
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