摘要
在对水稻品种进行抗病基因同源序列RGA(Resistance gene analogue)分析的基础上,应用品种多样性有利于病菌稳定化选择原理,选择抗性遗传背景差异大的品种,在吉安和石城进行混合间栽防治稻瘟病研究。不同年份不同生态环境下试验均表明,遗传背景差异大的水稻品种混合间栽,对稻瘟病有明显控制效果,特别是感病优质糯稻品种混合问栽后,稻瘟病发病率、病情指数均极显著下降,其防治效果达82．14％～95．91％。混合间栽对杂交稻稻瘟病也有一定控制效果,防治效果为40.82％～70．87％。与净栽相比,水稻产量增幅在6．03％～11．81％之间。
Field experiments of mixed-and pure-cropping of four rice varieties,including hybrid varieties and traditional high-quality varieties which had diverse genetic backgrounds, were conducted to study the controlling effects of variety diversity on the rice blast in Ji＇an County and Shicheng County on the basis of analysis on resistance gene analogue and the mechanism of stabilizing function of variety diversity to the plant pathogen. The results demonstrate that the appropriate mixed-cropping of rice varieties with different genetic backgrounds has a significant controlling effect on the occurrence of the rice blast,particularly for the highly susceptible traditional varieties. A significant decrease of incidence and disease index of rice blast are observed and the control efficiency is as high as 82.14 % - 95.91%. The control efficiencies of mixedcropping of hybrid rice on rice blast are 40.82 % - 70.87 % while the yield increases by 6.03 % - 11.81%.
出处
《中国生态农业学报》
CAS
CSCD
2007年第2期114-117,共4页
Chinese Journal of Eco-Agriculture
基金
国家高技术研究(863)发展计划项目(AA211021)
江西省科技厅重点攻关项目资助
关键词
水稻
品种多样性
稻瘟病
Rice, Variety diversity, Rice blast
