Criteria for the evolution of RXI.

Abstract

<p>Black curves are based on <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1003440#pgen.1003440.e005" target="_blank">eq. (3)</a> for the mutation-selection balance model of genetic variation (in which case, the <i>x</i>-axis refers to the female selection coefficient, <i>s_f</i>). The gray curve is based on <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1003440#pgen.1003440.e006" target="_blank">eq. (4)</a> for sexually antagonistic alleles maintained by balancing selection (here, the <i>x</i>-axis refers to the male selection coefficient: <i>t_m</i>). The area above each curve represents parameter space where unbiased RXI is not favored over PXI. RXI is favored under the complementary parameter space below each curve.</p