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Study on the possibilities to introgress the gossypol gland morphogenesis delay in seeds of cultivated cotton Gossypium hirsutum L.

Bi Irié VROH unknown (1998 only) laureate

°1966 Ivory Coast
MSc Genetics, Université d'Abidjan, Ivory Coast, 1992

Étude sur les possibilités d'introgresser le retard à la morphogenèse des glandes à gossypol de la graine chez le cotonnier cultivé Gossypium hirsutum L.

Cotton is not only the leading textile crop, it is also an important food crop. Its seeds contain 35 to 38% edible oil and 35 to 39% protein of high quality. The utilisation of this important food and feed source is limited because of the presence of gossypol in all parts of the plant. This very toxic compound confers to cotton a natural resistance against insect pests. Ideal cultivated cotton plants should have a reduced level of gossypol in seeds, for optimal food and feed uses, and a high level of gossypol in the remaining organs to limit pest incidence. The objective of this research is to introgress this useful trait from the wild diploid Australian species G. sturtianum Willis into the tetraploid cultivated cotton G. hirsutum L. In Gembloux an interspecific hybridization program produced progenies expressing the desired trait at different levels. Cytogenetic and molecular (RAPD, RFLP) analysis of these plants demonstrated their interest to produce commercial 'high-gossypol-plant and low gossypol-seed' cotton varieties.