Table 3.

Target of functional metabolites aimed to enrichment in fruit

Compounds	Breeding resource (Latin name)	Target gene or metabolite
Limonoids	Satsuma mandarin (C. unshiu Marc.)	UDP-gulcose: limonoid glucosyltransferase
Polymethoxyflavonoids	Nou-6 (‘King’ (C. nobilis Lour.) × ‘Mukaku kishu’ (C. kinokuni hort. ex Tanaka)), King (C. nobilis Lour.)	Flavonoid O methyltransferases (nobiletin and tangertine from sinensetine)
Hesperisin	Satsuma mandarin (C. unshiu Marc.), Hassaku (C. hassaku hort. ex Tanaka)	Conversion of rhamoside
Auraptene	‘Aura star’ (‘H·FD-1’ (Hassaku (C. hassaku hort. ex Tanaka) × ‘Hiryu’ (P. trifoliata var. monstrosa)), ‘Banpeiyu’ (C. grandis Osbeck))	Conversion of geranyloxy group
β-cryptoxanthin	‘Tamami’ (‘Kiyomi’ (‘Miyagawa wase’ (C. unshiu Marc.) × ‘Trovita’ orange (C. sinensis (L.) Osbeck)) × ‘Wilking’ (‘King’ tangor (C. nobilis Lour.) × ‘Willowleaf’ mandarin (C. deliciosa Ten.))	Carotenoid biosynthetic genes
Monoterpenes	Ponkan (C. reticulata Blanco), sweet orange (C. sinensis (L.) Osbeck)	Monoterpene biosynthetic genes