Figure 2.

Recovery rate of QTLs. Box plot of recovery rate for QTL loci, i.e. what fraction of QTL loci remain the same between repeated studies. Recovery varies according to whether experiments are repeated in different environments (study site, year or environment, sample size indicated under x-Axis) or by using different host or parasite lines (n = 15; χ² = 15.79, P < 0.001). Letters indicate statistically similar groups in pairwise post-hoc tests (t = 1.968, α = 0.05). The horizontal line marks the median value, boxes indicate ± one quartile and vertical lines indicate the range of observations.