Protein and Lysine Content, Grain Yield, and Other Technological Traits in Durum Wheat under Mediterranean Conditions

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• 作者：Yahia Rharrabti ; Sliman Elhani ; Vanessa Martos-Nú ; ñ ; ez ; and Luis F. Garc&iacute ; a del Moral
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2001
• 出版时间：August 2001
• 年：2001
• 卷：49
• 期：8
• 页码：3802 - 3807
• 全文大小：70K
• 年卷期：v.49,no.8(August 2001)
• ISSN：1520-5118

文摘

A major problem for durum wheat production in the Mediterranean region is yield fluctuation. Thisfluctuation 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 inadapted durum wheat ideotypes. Ten durum wheat cultivars differing in drought resistance weregrown 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 testweight (TW), SDS sedimentation, grain vitreousness, and protein per kernel appeared to bedetermined also by cultivar effect. Vitreousness was positively correlated with TW (r = 0.48**) andsemolina color (r = 0.46**). An inverse relationship was found between grain yield and proteincontent. Regression of cultivar mean values of protein content and grain yield showed a negativecorrelation (r = -0.72***), probably due to dilution of protein by non-nitrogen compounds andreduced starch accumulation in the grain under drought conditions. Lysine content was negativelyassociated with protein content (r = -0.86***), indicating the difficulty of a simultaneous breedingfor both characteristics.Keywords: Protein content; lysine content; grain yield; quality; durum wheat