Distinguishing citrus varieties based on genetic and compositional analyses.
Rui Min Vivian Goh1, Aileen Pua1,2, Francois Luro3
1Department of Food Science and Technology, National University of Singapore, Singapore, Singapore.
Plos One
|April 18, 2022
Summary
This study combined genetic markers and metabolite profiles to identify seven citrus varieties. Findings clarify the origins of citrus types, crucial for flavor and fragrance applications.
Area of Science:
- Agricultural Science
- Biochemistry
- Genetics
Background:
- Citrus variety classification is complex due to hybridization and local naming conventions.
- Understanding genetic and chemical profiles is key to accurate citrus identification.
Purpose of the Study:
- To genetically and chemically characterize seven citrus varieties.
- To identify potential biomarkers for citrus species differentiation.
- To explore the origins and flavor profiles of citrus hybrids.
Main Methods:
- Utilized simple sequence repeat (SSR) markers for genetic analysis.
- Analyzed secondary metabolite composition, including polymethoxyflavones, furanocoumarins, and volatiles.
- Compared genetic and chemical profiles against established citrus accessions.
Main Results:
- Two varieties identified as Mexican key limes, three as mandarin hybrids, and two as sweet oranges.
- Dalandan showed mandarin-like genetics, while Mosambi was identified as a sweet orange hybrid.
- Identified specific secondary metabolites as potential biomarkers for citrus separation.
- Observed variations in volatile and metabolite profiles within genetically similar groups, indicating distinct origins and flavor potentials.
Conclusions:
- Combined genetic and compositional analyses effectively revealed citrus origins and flavor profiles.
- This approach is vital for accurate variety screening and selection in the flavor and fragrance industries.
- Highlights the importance of detailed analysis for understanding citrus diversity and application potential.
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