Figure 2.

Estimated Proportion of Variance Explained by Local and Global Ancestry under Various Conditions

Average (±SD) estimated local and global variance explained under various simulated conditions. The sum of the true, unobserved, local and global variances was pre-specified. Global variance was set at either 0 (A and C) or 0.1 (B and D), and local variance was set as 0.1, 0.2, and 0.3 as determined by 1, 2, 3, 5, or 10 causal SNPs. The sum of the two variances is shown on the x axis. Each bar represents an average of 100 simulations; error bars show ±SD. (A and B) illustrate simulated conditions with no directional condition, while (C and D) restrict local effects to be greater than 0. (A and C) illustrate simulated conditions with no global effect, and (B and D) each have a pre-specified global effect.