Protein and lysine content, grain yield, and other technological traits in durum wheat under Mediterranean conditions
Protein and lysine content, grain yield, and other technological traits in durum wheat under Mediterranean conditions
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DOI：
10.1021/jf001139w
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发表时间：
2001-08-01
影响因子：
6.1
通讯作者：
del Moral, LFG
中科院分区：
文献类型：
--
作者：
Rharrabti, Y;Elhani, S;del Moral, LFG
地中海地区硬粒小麦生产的一个主要问题是产量波动。这种波动是由于降雨量的逐年变化和谷物生长期间的热应激造成的，这是典型的地中海气候。适应的硬粒小麦理想型既需要产量稳定，又需要良好的品质。十个硬粒小麦。 1998年，西班牙南部的三个地点在雨养和灌溉条件下种植了抗旱性不同的小麦品种。研究的主要性状包括蛋白质和赖氨酸含量、籽粒产量、容重、SDS 沉降、粗粒小麦粉颜色和籽粒玻璃质。结果显示位点对所有性状都有很大影响。只有容重 (TW)、SDS 沉降、籽粒玻璃质和每粒蛋白质似乎也由品种效应决定。玻璃体度与 TW (r = 0.48**) 和粗粒小麦粉颜色 (r = 0.46**) 呈正相关。谷物产量与蛋白质含量之间存在反比关系。品种蛋白质含量平均值与谷物产量的回归显示出负相关（r = -0.72***），这可能是由于非氮化合物稀释蛋白质以及干旱条件下谷物中淀粉积累减少所致。赖氨酸含量与蛋白质含量呈负相关（r = -0.86***），表明同时育种这两个特性的难度。
A major problem for durum wheat production in the Mediterranean region is yield fluctuation. This fluctuation is a result of year-to-year variation in precipitation and heat stress during grain growth, which is typical of the Mediterranean climate. Both yield stability and good quality are needed in adapted durum wheat ideotypes. Ten durum. wheat cultivars differing in drought resistance were grown during 1998, under both rainfed and irrigated conditions, at three sites in southern Spain. The main traits studied were protein and lysine content, grain yield, test weight, SDS sedimentation, semolina color, and grain vitreousness. Results show a high influence of site on all traits. Only test weight (TW), SDS sedimentation, grain vitreousness, and protein per kernel appeared to be determined also by cultivar effect. Vitreousness was positively correlated with TW (r = 0.48**) and semolina color (r = 0.46**). An inverse relationship was found between grain yield and protein content. Regression of cultivar mean values of protein content and grain yield showed a negative correlation (r = -0.72***), probably due to dilution of protein by non-nitrogen compounds and reduced starch accumulation in the grain under drought conditions. Lysine content was negatively associated with protein content (r = -0.86***), indicating the difficulty of a simultaneous breeding for both characteristics.