Skip to main content
Fig. 4 | Genome Biology

Fig. 4

From: The genetic architecture of temperature adaptation is shaped by population ancestry and not by selection regime

Fig. 4

Influence of linkage disequilibrium on the genomic response of a polygenic trait. We simulated 50 generations of polygenic adaptation after a shift in trait optimum. One hundred replicates, each with 10 contributing loci in a 1 Mb region either with linkage equilibrium (blue) or strong LD (yellow) are shown in violin plots. A Mean r2 estimates displaying the degree of LD in the two scenarios. B Independent of linkage structure, the same mean phenotype was reached, but simulations with high LD were considerably more scattered. C Pronounced allele frequency changes were obtained for both, linkage equilibrium, and high LD. For linkage equilibrium, the genomic windows were all rather similar, indicating that no window showed a strong selection signature distinguishing it from the genomic background. Simulations with strong LD, however, resulted in highly heterogeneous selection responses, with some windows having a frequency change larger than 0.6, which is a strong selection signature distinguishing it from the remaining genomic windows. D The heterogeneity among five replicate populations is measured by the coefficient of variation. The selection response in simulations with linkage equilibrium was less parallel than in those with strong LD

Back to article page