Variation in mitochondrial respiration traits among 40 of the DGRP wild-derived inbred lines. (Panels A-C) Distributions of line means for mitochondrial state 3 (Panel A) and state 4 (Panel B) respiration rates and P:O ratio (Panel C). Data represent means ± standard errors for n = 7 independent replicates. The red and blue bars depict females and males, respectively. (Panel D) Phenotypic correlation (r) between state 3 and state 4 respiration rates in the sex-pooled analysis. (Panel E) Phenotypic correlation between P:O ratio and state 3 in the sex-pooled analysis. (Panel F) Phenotypic correlation between P:O ratio and state 4 in females.