Accuracy of phasing. (A) Haplotypes of 134 genomic regions consisting of 50 SNPs were inferred from synthetic diploid genotypes of pseudoindividuals (random pairs of CHMs) by the PHASE program (V. 2.11). Switching errors were counted by the method of Lin et al. (2002). Each data point represents an average of 100 data sets. The range of SNP density was 10.7–350.0 SNPs per Mb. Regression line was obtained by the least square method. (B) Distribution of switch error rate is shown.