水稻品种中抗褐飞虱抗原次生物质的分析

借助高效液相色谱(HPLC)技术，研究了130份对褐飞虱生物型Ⅱ具有不同抗性水平的水稻样品(26个品种)中13个次生物质含量(峰面积)的差异；运用主成分分析和多元回归分析，建立了水稻品种抗性级别的预测模型：Y=3．4593-0．02491X1+0．08475X2-0．04227X8+0．1174X12结果表明，水稻的抗性水平与峰面积值之间极显著相关(r^2=0．84，P<0．01)，峰1、峰2、峰8、峰12对应的次生化合物是影响水稻对褐飞虱生物型Ⅱ抗性水平的主要抗原次生化合物；水稻品种中起抗虫作用的抗原次生物质不止一种，而是几种的组合，而且它们对水稻抗虫性的贡献权重是不完全相同的．

Secondary compounds in rice varieties resistant to Nilaparvata lugens

By the method of high-performance liquid chromatography (HPLC), this paper studied the contents of 13 secondary compounds from 130 samples of 26 rice varieties resistant to brown planthopper (BPH) Nilaparvata lugens biotype II. A prediction model was established through principal component analysis and multiple regression analysis: Y = 3.4593 - 0.02491 X1 + 0.08475 X2 - 0.04227 X8 + 0.1174 X12. The relationships between the BPH-resistant level of rice varieties and the area values of chromatographic peaks were significant (r2 = 0.84, P < 0.01). The results demonstrated that Peak 1, Peak 2, Peak 8 and Peak 12 were the major secondary compounds affecting the resistance to BPH biotype II, which suggested that the BPH resistance of the varieties came from the action of several secondary compounds that varied in contribution to the resistance.