---

期 刊 ：植物保护学报 2007年

关键词：小麦条锈菌；生理小种；致病性；流行；

Keywords:Puccinia striiformis f.sp.tritici, physiological race, pathotype, prevalence,

摘 要 ：小麦条锈菌新毒性小种的产生与发展是造成条锈病大流行及品种抗锈性丧失的主导因素。1999~2004年采用条锈菌生理小种变异监测、致病性及寄生适合度测定、毒谱分析、哺育品种调查等方法,对条中32号及水源14致病类型的流行预测进行了系统研究。结果表明,条中32号及水源14致病类型已经成为甘肃省第一、二位优势小种,两小种毒性谱宽、致病力强、寄生适合度高、哺育品种面积大,其流行趋势已超过条中31号,将继31号后成为危害甘肃省小麦生产的流行小种。 小麦条锈菌毒性群体结构已进入以条中32号和水源14致病类型为代表的Hybrid46和水源11致病类群占优势的新时期,这也对全国小麦条锈菌群体组成产生重要影响。

Abstract:The continuous occurrence and development of new virulent race is the main cause of stripe rust disease outbreak and breakdown of resistance to stripe rust in wheat cultivars. The epidemics of CY32 and Shuiyuan14 pathogenicity types were studied systematically by monitoring physiological races, testing pathogenicity and fitness, analysing virulent range and investigating the susceptible varieties in 1999-2004. The results showed that CY32 and Shuiyuan14 pathotypes were the first and second predominant races respectively in Gansu Province. Because of the high frequencies and fitness, wide virulent spectrum, with large number of virulent genes and strong pathogenicity, CY32 and Shuiyuan14 pathotypes have become the main prevalent races in Gansu Province. They will have a strong effect to race population in countrywide epidemic area.

---