Comparison of wheat cultivars grown in the field under different levels of moisture [Durum cultivars: Hourani, Stork, Wascana, Spring wheat Pavot 76]
1984
Duwayri, M. (Jordan Univ., Amman (Jordan). Faculty of Agriculture)
The objective of the experiment was to evaluate the performance of four wheat cultivars under different levels of moisture and to identify certain mechanisms which can be used to screen for drought resistance. The durum cultivars Hourani, Stork and Wascana and the spring wheat Pavon 76, were grown in the field under three levels of moisture stress: rainfed conditions (R), supplementary irrigation (SI), and stress (S) imposed at three leaf stage. Moisture levels affected the traits studied with stress treatment significantly reducing biological, grain and straw yield, plant height and area of flag leaf. The cultivars differred in the traits studied. Though no interaction was observed between variety X moisture level, the local cultivar Hourani was more stable under the moisture levels tested. The semi-dwarf cultivar Stork produced the highest grain yield (3248 kg/ha) under supplimentary irrigation and the yield was reduced by 35% when exposed to the stress treatment. Under supplimentary irrigation Hourani produced the lowest grain yield which was reduced only by 18% when grown under stress. Significant effects were not observed for moisture levels tested on flag leaf area after heading and on relative water content (RWC), however data showed that the reduction in the leaf area of Hourani and Wascana upon growing them under stress compared to (SI) treatment were smaller then in the case of Stork and Pavon 76
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