Fig. 2
From: Flavonoid Metabolic Profiles and Gene Mapping of Rice (Oryza sativa L.) Purple Gradient Grain Hulls
Heat map visualization and principal component analysis (PCA) with orthogonal projection to latent structure discriminant analysis (OPLS-DA) of relative flavonoids in different stages of hull heading. a Heat map visualization. b In the score plots for PC1 and PC2, strong cohesion was observed within groups, and good separation occurred between heading stages. c–e OPLS-DA model plots. W = pg-0d; BP = pg-10d; DP = pg-20d; Y = pg-30d