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首页> 外文期刊>African Journal of Biotechnology >Effect of water stress on yield and yield components of sunflower hybrids
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Effect of water stress on yield and yield components of sunflower hybrids

机译：水分胁迫对向日葵杂交种产量及产量构成的影响

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A field experiment during year 2009 was conducted in the research station of the University of Tehran, College of Abouraihan in Pakdasht region, Iran.? The study was aimed to investigate the effect of water stress on seed yield, yield component and some quantitative traits of ?four sunflower hybrids namely Azargol, Alstar, Hysun 33 and Hysun 25 under three different irrigation regimes; irrigation after 50 (normal irrigation), 100 (mild stress) and 150 (intense stress) mm cumulative evaporation from evaporation Pan class A. The experiment was laid out as a split plot design based on randomized complete block design (RCBD). The results showed that, water stress significantly (P > 0.05) decreased seed yield, yield components and seed oil content but increased the seed protein content in all the sunflower hybrids. The highest seed yield of 2591 kg ha-1?was obtained from normal irrigation. An increase of the seed protein content and a decrease of the seed oil content occurred when water input decreased. Although at different level of water stress, each hybrid behaved differently according to their genetic makeup. Alstar hybrid exhibited the highest value for all the mentioned characteristics, except for seed oil and protein contents. The results also indicated that, under normal irrigation, mild and intense water deficit stress, maximum seed yield was obtained by Azargol (3448 kg ha-1), alstar (2121 kg ha-1) and alstar (829 kg ha-1), respectively. Therefore, alstar hybrid under both levels of water deficit stress conditions in respect of seed yield and related traits such as seed number per head, 1000 seed weight and head diameter had the highest tolerance to these conditions. However, with normal irrigation, Azargol hybrid produced the highest seed yield.
机译：在伊朗Pakdasht地区的Abouraihan学院的德黑兰大学研究站进行了2009年的现场试验。本研究旨在研究水分胁迫对三种灌溉方式下四个杂种的杂种的种子产量，产量构成和一些定量性状的影响，这些杂种为Azargol，Alstar，Hysun 33和Hysun 25。在50级（正常灌溉），100级（轻度应力）和150级（强应力）后，从蒸发皿A类的累积蒸发中进行灌溉。该实验以基于随机完整区块设计（RCBD）的分割图设计进行布局。结果表明，水分胁迫显着（P> 0.05）降低了所有向日葵杂交种的种子产量，产量成分和种子油含量，但增加了种子蛋白含量。通过常规灌溉可获得最高的种子产量2591 kg ha-1?。当水输入减少时，种子蛋白质含量增加，种子油含量减少。尽管在不同的水分胁迫水平下，每个杂种根据其遗传组成表现出不同的行为。除种子油和蛋白质含量外，Alstar杂种对所有上述特性均表现出最高价值。结果还表明，在正常灌溉条件下，轻度和强烈的水分亏缺胁迫下，Azargol（3448 kg ha-1），alstar（2121 kg ha-1）和alstar（829 kg ha-1）可获得最大的种子产量，分别。因此，就种子产量和每头种子数，1000种子重量和头直径等相关性状而言，在水分亏缺胁迫条件下的alstar杂种对这些条件的耐受性最高。但是，在正常灌溉条件下，Azargol杂种的种子产量最高。

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