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首页> 外文期刊>Australian Journal of Crop Science >Evaluation of some bread wheat genotypes popular in Saudi Arabia under drought stress
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Evaluation of some bread wheat genotypes popular in Saudi Arabia under drought stress

机译：干旱胁迫下沙特阿拉伯一些流行的面包小麦基因型评估

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Six bread wheat genotypes were evaluated in three separate irrigation regime experiments to compare the response of agronomic performance and to identify genotypes with high yield potential under drought stress. The first irrigation treatment (I3) was given normal water irrigation (about 7000 m 3 ha -1 , according to recommendation for Qassim Region). The second (I2) and third (I1) treatments were given 2/3 and 1/3 of water amount of the first treatment, respectively. Factorial experiments in randomized complete block design with three replications were conducted during 2009/2010 and 2010/2011 seasons in the arid environment of central region of Saudi Arabia. Measurements were taken on days to heading, plant height, number of spikes m -2 , number of kernels spike -1 , 1000-kernel weight and grain yield. The drought susceptibility index (DSI) and water utilization efficiency (WUE) were calculated. The results revealed that effect of irrigation regime was highly significant for all traits, except days to heading. All studied characters were significantly decreased by reducing the amount of irrigation water. Grain yield showed maximum sensitivity as affected by moisture-stress. Means over environments indicated the existence of sufficient genetic variability among the genotypes for all the characters studied. Giza 171 recorded the highest values for most yield characters, while genotype 'Sama' was the lowest for the most yield characters. Giza 171, Sakha 93 and IC-1 recorded highest grain yield and WUE, based on average over irrigation treatments. Giza 171, Sakha 93 and IC-2 can be considered as drought stress tolerant genotypes.
机译：在三个单独的灌溉制度实验中评估了六种面包小麦的基因型，以比较农艺性能的响应并鉴定干旱胁迫下具有高产潜力的基因型。第一次灌溉处理（I3）进行常规水灌溉（根据Qassim Region的建议，约为7000 m 3 ha -1）。第二次（I2）和第三次（I1）处理的水量分别为第一次处理的2/3和1/3。在沙特阿拉伯中部干旱地区的2009/2010年和2010/2011年季节，进行了具有三个重复的随机完整区组设计的析因实验。在几天中进行了抽穗，植株高度，穗数m -2，穗粒数-1，千粒重和谷物产量的测量。计算了干旱敏感性指数（DSI）和水分利用效率（WUE）。结果表明，除了抽穗期外，灌溉制度对所有性状的影响都非常显着。减少灌溉水量可显着降低所有研究的特征。受水分胁迫影响，谷物产量显示出最大的敏感性。环境中的均值表明，对于所有研究的性状，基因型之间都存在足够的遗传变异性。吉萨（Giza 171）记录了大多数产量字符的最高值，而基因型“萨玛”（Sama）对于产量最多的字符最低。根据灌溉处理的平均值，吉萨171，萨哈93和IC-1的谷物单产和WUE最高。 Giza 171，Sakha 93和IC-2可被视为耐干旱基因型。

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