Fig. 3
From: A mapping framework of competition–cooperation QTLs that drive community dynamics

Direct, indirect, and genome–genome epistatic genetic effects of QTLs operating in a community. The genotypic value of genome–genome combination at QTL E635206 from E. coli and QTL S30869 from S. aureus for microbial abundance at 4 h is partitioned into its direct, indirect, and genome–genome epistatic genetic effect components. Upper left: direct effect of E635206 on E. coli growth. Lower left: direct effect of S30869 on S. aureus growth. Upper right: indirect effect of E635206 on S. aureus growth. Lower left: indirect effect of S30869 on E. coli growth. Middle: genome–genome epistatic effect of E635206 and S30869 on E. coli growth (left) and S. aureus growth (right). Within the same plot, left bar is the genetic effect, whereas right bar is the proportion of the total genetic variance at this interspecific QTL pair explained by each effect. The standard errors of each estimated effect are shown