Fig. 5

Additive effect analysis between candidate genes. a Circos plot showing candidate gene interaction analysis by the R package “SIPI”. The dots in the outer arcs represent −log₁₀^(p−value) of GWAS, and the secondary arcs represent the candidate gene structure. The links positioned at the center of the circle symbolize the additive-by-additive relationship between two SNPs. b Boxplots showing the oil content of additive-by-additive haplotypes which is higher than other of a single haplotype. p values show the significance of pairwise comparisons