SNP heritability of mtDNA copy number (y axis) contributed by each chromosome (x axis)
The points represent point estimates, and the bars represent the 95% confidence intervals, which were estimated using GCTA.24 The colors represent different sets of covariates. No covar = no correction for blood composition, sex, age, or PCs; PCs = correction for sex, age, and PCs; PCs + blood = additional correction for blood cell composition; PCs + blood + DARC = additional correction for Duffy-null genotype.