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通径分析表明,与小麦赤霉病抗性有关的花粉胆碱含量和小麦农艺性状的5个因素中,以花粉胆碱含量对抗性的直接作用最大,4个农艺性状的影响甚微,且其对抗性的影响主要是通过影响胆碱含量而间接起作用。应用纸上层析法,对43个品种的胆碱含量进行了测试,结果表明:不同品种的胆碱含量不同;小麦赤霉病病情等级值与花粉胆碱含量呈显著正相关。以抗、中抗、感3个标定品种的胆碱含量为标准、划分出的这些品种的抗性类型与人工接种的抗性表现基本一致,总符合率达87.5％。生态条件对胆碱含量的影响不大。花粉胆碱含量可作为预测小麦对赤霉病抗性的生化指标。
Path analysis showed that the direct effects of pollen and choline content on the resistance were the greatest among the five factors related to the resistance to wheat scab and the agronomic traits of wheat. The effects of four agronomic traits were negligible The impact of its antagonism is mainly indirectly through the impact of choline content. Choline content of 43 cultivars was tested by paper chromatography. The results showed that the content of choline in different cultivars was different. The grade of the disease was positively correlated with the content of choline in the pollen grains. The resistant varieties of these cultivars were basically the same as those of artificial inoculation, with the total coincidence rate of 87.5%. Ecological conditions have little effect on the content of choline. Pollen choline content can be used as a biochemical indicator of wheat resistance to scab.