Fig. 1

OPLS-DA analysis and heatmap of hierarchical clustering analysis of differential metabolites for three cotton cultivars. A Score scatter plot of OPLS-DA between each two cultivars. B The differential metabolites from three cotton cultivars used to draw the heatmap of hierarchical clustering analysis (HCA). The horizontal axis and vertical axis represent the different cottonseed samples and different metabolites, respectively. Each relative metabolite content is listed in Additional file 10: Table S6