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在苏丹进行了两个生长季节的研究，检测了小麦不同物候期温度对产量及其构成因素的影响和品种产量的稳定性。分别于１１月早期和晚期及１２月中期在重粘土上种植５个品种。各物候期的持续时间受品种和播期影响，这些小麦品种整个生育期的总积温为２３９０℃．ｄ。粒重与灌浆期间的平均气温呈负相关关系，且温度每上升１℃，粒重下降４ｍｇ。这似乎表明，在如此的高温环境下，最好的计划应是：在生长季节，晚熟品种早播，早熟品种晚播，这样可使抽穗处于最冷凉的时期。品种与环境的互作在穗粒数、粒重和产量上达极显著水平。品种ＥｌＮｅｉｌｅｉｎ在各种环境下，产量都很高，稳定性较大。
Two growing season studies were conducted in Sudan to examine the effects of different phenological periods of wheat on yield and its components and the stability of yield. Five varieties were planted on heavy clay in early and late November and mid-December respectively. The duration of each phenophase was affected by variety and sowing date. The total accumulated temperature of these wheat varieties during the whole growth period was 2390 ℃. d. Grain weight and filling temperature during the average temperature was negatively correlated, and the temperature rise 1 ℃, grain weight decreased 4mg. This seems to suggest that in such a high temperature environment, the best plan should be: early growing season, late maturity varieties, early maturing varieties of late sowing, so that heading in the coldest period. The interaction of variety and environment reached extremely significant level in grains per spike, grain weight and yield. Variety ElNeilein in a variety of environments, the yield is high, more stable.