Fig. 4From: How imputation can mitigate SNP ascertainment BiasDevelopment of correlation within population group (a), slope (b) and mean overestimation (c) of the regression lines for the two heterozygosity estimates when distributing the reference samples equally across all populations (allPop_74_740). The intended value for unbiasedness and minimum variance is marked as dense black horizontal line. Note that the case without imputation is consistent with zero reference samplesBack to article page