Fig. 2
Epistatic quantitative trait loci (QTLs) detected in the joint F2 population. (A) Circos plot for QTL interactions. The outside circle shows a linkage map, and the second and third layers indicate confidence intervals detected by single-QTL analysis. The center lines connecting QTLs are significant interactions. Red and blue represent the results of CL and FD, respectively. (B–F) Genetic effects of QTL interactions detected for CL (B–C) and FD (D–F). These vertical axes show residual values regressed on trait values by year effects. These horizontal axes and line colors represent genotypes of the nearest markers of the QTLs. “A” and “B” are the alleles of MS79 and 74LH3213, respectively. For corresponding genes of QTLs, the genotype of the marker indicates whether it is a dominant or recessive allele. Error bars indicate the standard errors. Different letters in the line graphs indicate significant differences in the Tukey’s test among genotypes of one QTL on the horizontal axis for each genotype of another QTL.
