Conséquences du stress hydrique chez huit cultivars de pomme de terre (Solanum tuberosum L.)

Abstract

The objective is to identify, in the greenhouse conditions, genotypes of Potato, which are well adapted to climate of Sahel, characterised by almost permanent water deficit. Désirée and Sahel present the best yield in terms of the number of tubers obtained per plant, with 5.6 and 5.4 tubers/plant respectively. The best weight of tuber yield is obtained from Sahel (124.2 g/plant), Claustar (110.2 g/plant) and Aïda (104.4 g/plant). Claustar, Sahel and Atlas are the most resistant to water stress, with yield reduction estimated at 80, 68 and 62% respectively. Best results on the ratio plant growth/tuber yield are obtained with cv Claustar and Sahel in the conditions of water stress. The mean values of tuber yield parameters converge on the index rate of susceptibility to drought according to Acevedo (1991).