论文部分内容阅读
水稻稻瘟病是上海郊区水稻生产上主要病害之一,尤以优质和特色米的未改良品种发生更烈。据1988年对武香粳1号和铁桂丰两品种的调查,穗瘟发病率重病田在50％以上,宝山罗泾乡有一农户的近半亩铁桂丰,稻瘟发生率在90％,基本上失收。故是影响水稻稳产的重要因素之一。通过栽培措施和喷洒杀菌剂可以防治稻瘟病,但收效不大,而且费工,增加农本和污染环境、因此,培育和应用抗瘟品种是防治稻瘟病的最有效途径。SX0832就是应用软X射线对具有香味、优质、抗瘟性弱的香粳203品种进行辐射处理,对其后代筛选得到的新品
Rice blast is one of the major diseases in the rice production in Shanghai suburbs, especially unimproved varieties of high quality and characteristic rice occur more intensely. According to a survey of two varieties of Wuxiangjing 1 and Tieguifeng in 1988, the incidence of severe panicle blast was over 50% and that of a household in Luojing, Baoshan was about half of that of Tieguifeng. The incidence of rice blast was over 90% , Basically lost. It is one of the important factors that affect the stable rice yield. Through cultivation measures and spraying fungicides, it is possible to prevent and control blast, but with little effect, and it takes a lot of labor to increase the cost of farming and environmental pollution. Therefore, cultivating and applying blast resistant varieties is the most effective way to control blast. SX0832 is the application of soft X-ray radiation on the fragrant, high quality, low blast resistance Xiangjing 203 varieties, screening of their offspring new products