棉铃疫病菌(Phytophthora boeh meriae)对甲霜灵的抗性遗传研究  

Studies on metalaxyl-resistance inheritance of Phytophthora boehmeriae causing cotton boll blight

作　　者：陈方新[1] 高智谋[1] 齐永霞[1] 吴红星 吴向辉[1] 

机构地区：[1]安徽农业大学植保系,合肥230036 [2]安徽省望江县高士农技站,望江246260

出　　处：《植物病理学报》2004年第4期296-301,共6页Acta Phytopathologica Sinica

基　　金：安徽省自然科学基金项目 ( 0 0 0 4160 4)资助 ;安徽省高等学校青年教师科研计划项目 ( 2 0 0 3 jq119)资助 ;校青年基金项目 (校科字 [2 0 0 2 ] 3号 )资助

摘　　要：本文在实验室条件下 ,经药物直接诱变 ,筛选获得棉铃疫病菌 (PhytophthoraboehmeriaeSawada)抗甲霜灵突变株 ,研究了其抗药性性状的遗传。结果表明 ,棉铃疫病菌易对甲霜灵产生抗性 ,抗性菌株对甲霜灵的抗性水平可高达其敏感亲本的 5 16 1 3倍以上 ;部分抗性菌株的抗药性性状在无性及有性单孢后代均可稳定遗传 ,另有部分抗性菌株的抗性性状在无性单孢后代出现分离甚至完全丧失。初步认为 。The resistance inheritance of the metalaxyl-resistant mutants(Mt^r) of P. boehmeriae Sawada obtained by metalaxyl-induction was studied in vitro. The results showed that the tested pathogen deve-(loped) the resistance to metalaxyl easily, and that the resistance level of Mt^r mutants was over 5 161 3 times higher than that of their sensitive parental isolates to metalaxyl. The resistance of some mutants to metalaxyl could steadily inherit in their asexual and sexual generations, but the resistance of some mutants to metalaxyl displayed obvious variation in the first and second single-zoospore progenies, even lost completely. It was suggested that metalaxyl-resistance of P. boehmeriae causing cotton boll blight might be controlled by cytoplasmic genes.

关 键 词：棉铃疫 甲霜灵 抗性遗传 苎麻疫霉 

分 类 号：S435.621.2[农业科学—农业昆虫与害虫防治]