Linkage disequilibrium between outlier locus pairs versus neutral locus pairs in hybrid individuals.

<p>The product of differences in allele frequencies [(p–q)*(r–s)] between parental populations for all pair-wise combinations of loci between P24(XY)-east and <i>viatica</i>17-east, versus linkage disequilibrium (LD) between the same locus pairs in hybrid individuals. Black open circles: non-outlier locus pairs, red filled circles: pairs of outlier loci identified only in the <i>viatica</i>17-east and P24(XY)-east comparison, green filled circles: pairs of outlier loci identified both in the <i>viatica</i>17-east and P24(XY)-east comparison and the <i>viatica</i>17-south and P24(XY)-north comparison. Outlier points with positive x-axis values comprise outlier locus pairs, of which both were fixed for the presence allele in the same population. Outlier points with negative x-axis values comprise outlier locus pairs which were fixed for the presence allele in opposite populations.