PhD defence

Orphan no more: Ethnobotany and genetic analysis of leaf yield and secondary metabolites content in Gynandropsis gynandra (Cleomaceae)

PhD candidate EOD (Deedi) Sogbohossou
Promotor prof.dr. ME (Eric) Schranz
Co-promotor dr EG Achigan-Dako
Organisation Wageningen University, Biosystematics
Date

Mon 16 December 2019 13:30 to 15:00

Venue Auditorium, building number 362
Generaal Foulkesweg 1
362
6703 BG Wageningen
0317-483592

Summary:

This thesis aimed at generating baseline scientific information for the development of breeding programs for Gynandropsis gynandra, an orphan leafy vegetable used in Africa and Asia. After developing a roadmap for orphan leafy vegetables breeding programs, germplasm collection missions were conducted in West Africa to enrich existing collections. Investigations of knowledge, use and management of G. gynandra in seven communities in Benin and Togo allowed identifying communities to be used as entry points for promotion of the species. I also assessed the natural variation in morphology and secondary metabolites production in a collection of accessions from Africa and Asia. Accessions from East Africa, West Africa and Asia had distinct morphological features and metabolic profiles, differences partially reflected at the genomic level. Building the first genetic map in the species allowed identifying candidate genes for plant height, leaf area, flowering time and biosynthesis of provitamin A and vitamin E compounds. This research opens the path towards developing nutrient-rich and high-yielding varieties of G. gynandra for African and Asian markets.