KOFFI Eric-Blanchard Zadjéhi^1,, DIARRASSOUBA Nafan¹, KONAN N’guessan Ysidor¹, YAO Saraka Didier martial¹, SAHI Gonkapeu Achille¹, SIE Raoul Sylvère²

Onion production is low in Côte d'Ivoire. The country is therefore dependent on producer countries in the sub-region. One of the solutions would be to select adapted varieties to the growing conditions of the production areas. It is for this purpose that this study was conducted. This study aims to determine the agronomic and morphological characteristics of five varieties of onion in order to select the best ones. The experiment was carried out in a block with three replications. Data’s used was vegetative characteristics and bulb yield components. Multivariate analysis were performed on the collected data. The results revealed three agromorphological groups. The first group, composed of the varieties BATI and KARIBOU, is characterised by a high seed germination rate (85.65%), heavier bulbs (40.19 g), large size (bulb diameter=4.26 cm), a greater number of thick (0.14 cm) scales (6 scales) and a high bulb yield (4.02 kg/m²). The second (Group 2) consisting of the varieties CARA and DAMANI recorded the highest plant height (42.19 cm), longer leaves (40.19 cm) and longer bulbs (4 cm). The third (Group 3) consisting of the variety SAFARI gave intermediate morphological characteristics to the two previous groups. Based to the measured characteristics, the varieties BATI and KARIBOU with interesting agronomic characteristics are to be recommended to farmers in Korhogo to make onion cultivation profitable.

selection, onion, agromorphological performance, Côte d’Ivoire