e-journal
Diversity among mandarin varieties and natural sub-groups in aroma volatiles compositions
Abstract:
BACKGROUND: Mandarins constitute a large, diverse and important group within the Citrus family. Here, we analysed the aromavolatiles compositions of 13 mandarin varieties belonging to seven genetically different natural sub-groups that included commonmandarin (C. reticulata Blanco), clementine (C. clementina Hort. ex. Tan), satsuma (C. unshiuMarcovitch), Mediterranean mandarin (C. deliciosa Tenore), King mandarin (C. nobilis Loureiro), and mandarin hybrids, such as tangor (C. reticulata × C. sinensis) and tangelo (C. reticulata × C. paradisi).
RESULTS: We found that mandarin varieties among tangors (‘Temple’, ‘Ortanique’), tangelos (‘Orlando’, ‘Minneola’) and King (‘King’) had more volatiles, at higher levels, and were richer in sesquiterpene and ester volatiles, than other varieties belonging to the sub-groups common mandarin (‘Ora’, ‘Ponkan’), clementine (‘Oroval’, ‘Caffin’), satsuma (‘Okitsu’, ‘Owari’) and Mediterranean mandarin (‘Avana’, ‘Yusuf Efendi’). Hierarchical clustering and principal component analysis accurately differentiated between mandarin varieties and natural sub-groups according to their aroma-volatile profiles.
CONCLUSIONS: Although we found wide differences in aroma-volatiles compositions among varieties belonging to different natural sub-groups, we detected only minor differences among varieties within any natural sub-group. These findings suggest that selecting appropriate parents would enable manipulation of aroma-volatile compositions in future mandarin breeding programmes
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