La diversité des échanges de plantes au regard des échanges interdisciplinaires

Anne Luxereau (1) , G. G. Lakis (2) , Amal Abad (3) , M. Maï-Ousmane , Alodie Snirc (2) , Françoise Lamy (2) , Y. Y. Dussert (2) , Christine Raimond (4) , Eric Garine-Wichatitsky (5) , Thierry Robert (2, 3)

1 EAE - Eco-Anthropologie et Ethnobiologie
2 ESE - Ecologie Systématique et Evolution
3 UPMC - Université Pierre et Marie Curie - Paris 6
4 PRODIG - Pôle de recherche pour l'organisation et la diffusion de l'information géographique
5 LESC - Laboratoire d'ethnologie et de sociologie comparative

Despite the long history of human migration and trade across the Lake Chad Basin, few is really known about the exchanges of biological material. Social and biological factors modulating genetic exchanges for two crops, pearl millet (outcrossing) and Bambara groundnut (selfing) were investigated. For pearl millet, the pattern of varietal and genetic diversity strongly suggests that genetic exchanges between landraces grown by the different socio-linguistic groups along the Lake Chad Basin are surprisingly limited. Bambara groundnut displays an opposite pattern, despite the limited dispersal of its genes by pollen flow. Our results rather suggest that seed exchanges have been large across the whole Lake Chad Basin for this species. Altogether, our data stimulate a more in-depth investigation on seed exchanges networks.

Mots clés: Lake chad basin; pearl millet; seed exchanges

Domaines: Sciences de l'Homme et Société

Anne Luxereau, G. G. Lakis, Amal Abad, M. Maï-Ousmane, Alodie Snirc, et al.. La diversité des échanges de plantes au regard des échanges interdisciplinaires. Sergio Baldi; Géraud Magrin. Échanges et communication dans le bassin du lac Tchad, Università "L'Orientale", p.37-57, 2014. ⟨halshs-01444341⟩