Figure 4

Candidate gene ribulose 1,5-bisphosphate carboxylase/oxygenase small subunit.(a) Distribution of the expression level of the gene RBC relative to the housekeeping gene Actin across all 509 inbreds ordered by the gene expression level. (b) Violinplot of the gene expression level of RBC for the eight different germplasm types and (c) for the three MCLUST groups. (d) P-value profile from genome-wide association mapping for the gene expression level of the RBC gene for all 509 inbreds, (e) for the inbreds of the MCLUST group 1, (f) for the inbreds of the MCLUST group 2, and (g) for the inbreds of the MCLUST group 3. The x-axis shows physical map positions of the SNPs along the 19 chromosomes, the y-axis gives the -log₁₀ P-value of the association test. The horizontal dashed and dotted lines indicate the P-value = 0.0001 threshold and the threshold after Bonferroni correction (P-value = 0.05), respectively.