Tropicultura (Jan 2003)
Sélection de variétés d'oignon (Allium cepa L.) adaptées au nord de la Côte d'Ivoire
Abstract
Selection of Varieties Onion (Allium cepa L.) Adapted to the North of Ivory Coast. Sixteen varieties of onion from the collection of the National Agronomical Research Center were evaluated on the basis of their performance in the North of Ivory Coast, during the agricultural season 1998- 1999. This evaluation was made in the presence of a local control, Violet de Galmi, at the station of production of onion seeds of the Rural Development Support National Agency. Varieties Rouge de Tana, RCS1903, RCS2211 and RCS2302 gave a higher rate of healthy bulbs (64.07% on average) than the others. For the total yield, varieties RCS1903, RCS2211 and RCS2302 produced more (18.18 t/ha on average) than Violet de Galmi (14.58 t/ha). The latter was more productive than Rouge de Tana (12.56 t/ha). However only the purple variety, Rouge de Tana had a high content of dry matter (20.86%) and was good preserved with nearly 95% of healthy bulbs after 3 months of storage, like the local control. Significant correlations appeared between the various studied characters. The most significant correlation was observed between the date of harvest and the percentage of layering at 100 days (r= -0.858); and the rate of healthy bulbs after 3 months of storage and the content of dry matter (r= 0.847).
