Mean correlation R² and IQS between true and imputed genotypes for all approaches, using the random selection strategy: (A) R² for EUR; (B) R² for AFR; (C) IQS for EUR; (D) IQS for AFR. The first/second of a pair of programs in the key indicates phasing/imputation functions. Computation of the mean of R² and IQS is based on all 100 genetic data sets with a sample size of 960 subjects, each having 7954 SNPs for EUR and 10,891 SNPs for AFR.