Rice grain quality has now become the primary consideration
of rice customers and breeding programs. Biofortification by
conventional breeding is one of the strategies to improve the
nutritional quality of rice grains. The most promising varieties for
future breeding purposes would be those with the highest flavonoid and carotenoid contents. Flavonoid and carotenoid contents
clearly differ with grain color, but these components still differ
among black rice cultivars (Table 1); the black rice cultivar BR-2
had the highest flavonoid and carotenoid contents among those
examined in the present study.