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首页> 外文期刊>African Journal of Agricultural Research >Responses of morphological traits of spring wheat to drought stress in Qinghai Province of China
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Responses of morphological traits of spring wheat to drought stress in Qinghai Province of China

机译：青海省春小麦形态性状对干旱胁迫的响应

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Spring wheat is a widely planted crop in Qinghai Province of Northwestern China, where drought acts as a major bottleneck for stable production. However, responses of wheat to moisture deficit remain unclear in this region. Experiments of 60 spring wheat cultivars in randomized complete bock design with three replications were carried out to determine effects of moisture deficit on 11 morphological traits under normal irrigation and drought stress at Ping’an Ecological Agriculture Station, Qinghai province, China. The results showed that all the morphological traits except plant height (PH) were significantly influenced by water condition. Internode length under spike (IL), tillers per plant (T/P), spikelets per spike (S/S), fertile spikelets per spike (FS/S), and grain weight per spike (GW/S) were mainly affected by water condition and could be used as indexes of moisture deficit. Spike length (SL), distance of spike to flag leaf (DSL), kernels per spikelet (K/S), grains per spike (G/S), and 1000 grain weight (GW) were influenced by genotypes and their interaction with environments. Drought stress changed correlations among the morphological traits. The results of non-metric multidimensional scaling (NMDS) on morphological traits revealed that the 60 cultivars responded to moisture deficit similarly. The distance of cultivars in the same decade between normal irrigation and drought stress became larger with time, indicating that the current breeding program has enlarged the difference of cultivars to water-limited environment and it might reduce yield stability under high extreme drought frequency in the future.
机译：春小麦是西北地区青海省的一种广泛种植的作物，干旱是稳定生产的主要瓶颈。但是，该地区小麦对水分缺乏的反应仍不清楚。在青海省平安生态农业站进行了60个春小麦品种随机三倍重复设计的试验，以确定水分亏缺对正常灌溉和干旱胁迫下11个形态性状的影响。结果表明，除株高（PH）外，其他形态性状均受水分条件的影响。穗下节间长度（IL），单株分till（T / P），每穗小穗（S / S），每穗可育小穗（FS / S）和每穗粒重（GW / S）主要受以下因素影响水分状况，可用作水分亏缺指标。基因型及其与环境的相互作用会影响穗长（SL），穗距剑叶的距离（DSL），每穗小粒仁（K / S），每穗小粒（G / S）和1000粒重（GW） 。干旱胁迫改变了形态性状之间的相关性。对形态性状的非度量多维标度（NMDS）结果表明，60个品种对水分亏缺的反应相似。随着时间的推移，正常灌溉和干旱胁迫下同一品种的距离随着时间的推移而变大，这表明当前的育种计划扩大了品种在缺水环境中的差异，并可能在未来的极端干旱频率下降低产量稳定性。 。

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