1993～ 1 999年 ,作者在小麦白粉病菌非自然越夏区陕西杨凌建立的模拟鉴定病圃中 ,对 9个已知抗病基因鉴别材料和 5个小麦常规品种苗期、成株期抗病性变化进行了系统观测。结果表明 ,病圃中小麦白粉病混合菌系组分复杂 ,年度间寄主反应有所变化。 5个小麦品种中 ,淮阴 894、阿勃、陕 2 2 5等 3个品种抗、感病性相对稳定 ,是较理想的参照品种。对如何延长抗病品种使用年限及抗病选育方法提出了商榷建议 From 1993 to 1999, the authors identified 9 known disease resistance genes and 5 conventional wheat varieties in seedling stage, adult-stage disease-resistance in the simulated nursery garden established by Yangling, Shaanxi Province, Sexual changes were observed systematically. The results showed that the composition of wheat-powdery mildew in the nursery was complicated and the host reaction changed during the year. Five varieties of wheat, Huaiyin 894, Aibo, Shaanxi 2 2 5 and other three anti-resistance, susceptibility is relatively stable, is an ideal reference species. Proposals on how to prolong the useful life of disease-resistant cultivars and the methods of disease-resistance breeding were put forward