水稻条纹叶枯病抗性育种研究

利用日本育成的抗条纹叶枯病优质粳稻品种，与江苏高产品种杂交，将其条纹叶枯病抗性导入江苏高产粳稻品种，达到有利基因的聚合，改良现有粳稻品种的条纹叶枯病抗性。结果表明，在充分发病的自然条件下对条纹叶枯病抗性选择的效果十分明显，只要具有一定的选择压，很容易选择到抗性好的株系。关东194是一个优良的条纹叶枯病抗源亲本，在粳稻条纹叶枯病抗性改良和品质改良中值得加以利用。通过连续3年的定向选择，已经获得一批抗条纹叶枯病的优良品种（系）。其中“宁4009”已于2007年1月通过江苏省审定，定名为“南粳44”。

Rice Breeding for Resistance to Stripe Virus Disease

In order to improving the resistance to rice stripe virus disease of japonica rice, japonica varieties with high yield developed in Jiangsu province were crossed with Japanese varieties with resistance to rice stripe virus disease and good quality. The results showed that the resistance gene controlling rice stripe virus disease could be easily transferred from one variety to another one. It was effective to select resistant lines under natural conditions suitable for occurrence of stripe virus disease. Kantou 194 was a good parent for improving resistance to rice stripe virus disease and grain quality. Some breeding lines resistance to stripe virus have been developed through orientated selection for three generations and “Ning 4009” has been registered as “Nanjing 44” in Jiangsu province in 2007.