干旱胁迫对不同基因型啤酒大麦品种(系)生长发育的影响

Effects of Drought Stress on Growth and Development of Different Genotypes of Malting Barley Cultivars(Lines)

以抗旱基因型品种(系)甘啤5号、甘啤7号和9810-49及敏感基因型品种(系)甘啤4号、甘啤6号和9821-118为供试材料,采用裂区设计,在抗旱棚进行正常灌水(I)和干旱胁迫(D)盆栽试验。结果表明,干旱胁迫后,不同基因型啤酒大麦品种的单株分蘖数和成穗数、株高、穗长、穗粒数、千粒重、生物产量等指标均比灌水处理显著降低,降低幅度品种间差异明显,这主要由品种自身特性决定,与啤酒大麦的抗旱性没有显著相关关系。叶面积、叶片含水量、根体积和根干重也显著降低。抗旱品种叶面积较小,叶片含水量较高,根体积和根干重较大,干旱胁迫后下降幅度较小,与啤酒大麦的抗旱性有比较明显的相关关系,可作为啤酒大麦抗旱性评价的主要形态指标。

With drought-resistant genotypes cuhuivars and susceptible genotypes cultivar as test material. Split Plot Design （SPD） experiment is conducted to analyze the characteristics of different malting barley euhivar based on the pot experiment of the tow treatments （I：Normal irrigation, D：Drought stress）. The result indicates that the all indexes in drought stress are lower than in normal irrigation, but the indexes different of tills per plant, spikelets number, plant height, spikelet length, grain numbers per spikelet, thousand seed weight, biological production is obvious between those malting barley cultivars, and these are decided by the characteristics of varieties, hadn＇t relation with the drought resistance. The leaf area of drought resistant varieties is smaller, leaf water content is higher, root volume and root dry weight are larger, and those indexes have obvious correlation with barley drought resistant. These can be used as the main evaluation indicator of malting barley drought resistance.