摘要
以紫外线照射小麦条锈菌条中29号小种夏孢子诱发突变,用抗病小麦品种筛选毒性突变体,建立了7个毒性突变菌株,毒性突变率为10^(-6)~10^(-4),各突变菌株都能正常感染其筛选品种,其毒性谱不同于任何已知小种。抗源品种群体对突变菌株有明显的抗性分化。研究证实毒性突变是该菌毒性变异的重要途径。
Uredospores of parent culture, cy 29-1, were treated by ultraviolet radiation and mutations to virulent were tested on resistant wheat cultivars inoculated with treated spores. 7 mutant cultures virulent to the test cultivars were developed with estimated mutation rate 10~6~10~4. The virulence of mutant cultures was different from the all known races of stripe rust. Resistance segregation to mutant cultures was detected in two test cultivars. The results suggested that mutation was important mechanism of virulence variation operative in asexual population of rust fungi.
出处
《植物病理学报》
CAS
CSCD
北大核心
1994年第4期347-351,共5页
Acta Phytopathologica Sinica
基金
高等学校博士学科点专项科研基金
关键词
小麦
条锈菌
突变
毒性
紫外线诱导
条锈病
Puccinia striiformis Mutation Virulence Ultraviolet radiation