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Eggplant Domestication: Pervasive Gene Flow, Feralization, and Transcriptomic Divergence.
Anna Page1, Jane Gibson1, Rachel S Meyer2
1Biological Sciences, University of Southampton, Southampton, United Kingdom.
Molecular Biology and Evolution
|May 1, 2019
Summary
Genomic studies reveal eggplant
Area of Science:
- Genomics
- Crop domestication
- Plant genetics
Background:
- Understanding crop domestication is crucial for food security.
- Eggplant (Solanum melongena L.) domestication involves identifying genes for desirable traits.
- Solanum insanum L. is confirmed as the wild progenitor of eggplant.
Purpose of the Study:
- To investigate the genomic changes during eggplant domestication.
- To identify genes under selection and their role in phenotypic evolution.
- To clarify the complex domestication trajectory of eggplant.
Main Methods:
- Genome-scale single nucleotide polymorphism (SNP) analysis.
- Comparative transcriptomics to identify loci under selection.
- Population genetics to analyze genetic variation and admixture.
Main Results:
- Solanum insanum L. is the wild progenitor, with domesticates originating from the Eastern group.
- A significant genetic bottleneck reduced variation during domestication (approx. 50% in primitive, 10% in landraces).
- Selection was observed on genes related to wounding response, apoptosis, defense, flowering, and signaling.
Conclusions:
- Genomic and population genetics analyses reveal key changes during eggplant domestication.
- Downregulation of defense and signaling genes occurred in derived eggplant populations.
- This study clarifies the complex domestication pathway of eggplant, impacting food security research.
Keywords:
admixtureauberginebreedingcrop evolutioncrop-wild gene flowdomesticationeggplantferalintrogressionMore Related Videos
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