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在分蘖期对15份大麦基因型进行12d的渍水处理,研究渍水条件下生长抑制和产量损失的基因型差异.结果表明,黄化指数(LCI)虽然不能完全反映所有基因型的产量损失程度,但作为耐湿性的一个指标对大多数基因型是可靠的.在渍水期间和撤水后,大部分大麦基因型新长的叶长和叶宽下降,但93-3143变化不大;渍水处理与对照相比,株高和干重平均降低29.2%和54.4%,基因型间差异显著,Franklin的降幅最大.渍水下导致籽粒产量显著下降,产量构成因子中以穗数下降最为明显,其次是每穗粒数,粒重变化较小,而穗数减少主要是分蘖及其成穗数下降的结果.渍水对产量影响的基因型差异很大,地方品种永嘉红六棱减产最小,两个澳大利亚主栽品种Franklin和Gairdner减产最为严重.产量构成因子对产量的直接通径系数大小依次为:穗数、粒数和粒重,穗数经粒数对产量的影响很小,经粒重的间接通径系数较大且为正值;粒数经穗数对产量的影响亦较小,经粒重的间接通径系数较大且为负值;粒重经穗数和粒数对产量的影响均较大,但作用方向不同.
The 15 barley genotypes were treated with waterlogging for 12 days at tillering stage to study the genotype differences of growth inhibition and yield loss under waterlogging.The results showed that the LCI did not fully reflect the yield loss of all genotypes However, as an indicator of moisture resistance, it is reliable for most genotypes. During the waterlogging and after water withdrawal, the leaf length and leaf width of most of the new barley genotypes declined, but 93-3143 changed little. Compared with the control, the average height and dry weight of waterlogging treatments decreased by 29.2% and 54.4%, respectively, with significant differences among genotypes, with Franklin declining most significantly. Under waterlogging, the grain yield was significantly decreased and the spikelet number in yield components was the most Significantly, followed by the number of grains per panicle, grain weight change is small, and the reduction of spike number is mainly the result of tillering and spike number of panicles.Different genotypes of waterlogging affected yield, The smallest, the two Australian cultivars Franklin and Gairdner the most serious reduction in production factors yield direct path coefficient size in turn as follows: the number of spikes, grain number and grain weight, the number of spikes through grain number on the yield is small, Between the weights The path coefficient is larger and positive; grain number by the number of spikes on the impact of yield is also small, the grain size of indirect path coefficient larger and negative; grain weight by the number of spikes and grain yield on the impact Are larger, but the role of different directions.