寒地水稻种质资源稻瘟病抗性研究

为了筛选出优异的水稻稻瘟病抗性材料,收集并整理我国黑龙江省、吉林省、辽宁省以及日本、韩国共203份水稻种质资源,按照不同的育成时期、来源进行分类,利用2a的抗病鉴定结果进行资源评价。结果表明:旱育稀植时期育成的品种稻瘟病抗性有很大的提高,韩国的水稻资源有更好的稻瘟病抗性。资源的年际间抗性有差异,应对材料进行多年、多点的鉴定。因此,在利用自然条件对育种材料抗稻瘟病筛选后,用接菌的方式对自然感病筛选出的未发病材料进行接菌鉴定能提高抗病鉴定的准确性。

Research on Rice Blast Resistance of Rice Germplasm Resources in Cold Region

In order to select the outstanding resistance materials against rice blast, 203 rice varieties from Japan, Korea and China including Heilongjiang,Jilin and Liaoning provinces were categorized according to the time of breeding and source. Rice blast resistance of these germplasm resources in two years was investigated. The results showed that the blast resistance of rice varieties raised rapidly in dry-raising and sparse-planting stage, meanwhile, the rice blast resistance of varieties from Korea was stronger than that from other regions. The rice blast resistance level appeared various in different year, so the rice varieties should be evaluated in different years and areas. Inoculation indentification by Magnaporthe oryzae under natural environment promoted the accuracy for blast resistance.