Figure 5.

Pathway analysis of lipid metabolites for diploid vs. tetraploid groups and determination of free fatty acids in brown rice. (A) Functional annotation and KEGG classification of lipid metabolites. The ordinate is the name of the KEGG metabolic pathway, the abscissa is the number of metabolites annotated to the pathway and its proportion in the total number of lipid metabolites annotated. The proportions of “Biosynthesis of unsaturated fatty acids” and “Metabolic pathways” were both 18% (green background). In addition, the proportion of “alpha-Linolenic acid metabolism” was 4.55% (yellow background). (B) Determination of free fatty acids in diploid (2X, yellow) and tetraploid (4X, white) brown rice. * Significantly different at 0.05 probability level. ** Significantly different at 0.01 probability level.