耐冷耐密玉米自交系丝黑穗病接种抗性研究

Study on Inoculation Resistance of Maize Inbred Lines Cold Tolerance and Density Tolerance to Head Smut

玉米丝黑穗病是黑龙江省玉米生产的重要病害之一,在世界各地都有不同程度的发生,发病率基本上等同于损失率。培育抗丝黑穗病玉米新品种是控制该病的重要措施之一。本文利用3个对玉米丝黑穗具有不同抗性的玉米自交系(合选16、合选23和合选35)对3种接菌措施下6种接种浓度进行致病率研究。结果表明:播种前现拌菌土浓度为2‰~3‰时,致病效果及经济性最好。

Head smut of maize has become one of the most important diseases in Heilongjiang Province,which can reduce the yield and occur in all over the world.Consequently,it is the most effective to breed disease-resistant varieties for controlling head smut of maize.Breeding new maize varieties resistant to head smut is one of the important measures to control the disease.In this study,the morbility of maize was established after inoculation by S.reiliana using three inbreed lines(Hexuan 16,Hexuan 23 and Hexuan 35),3 inoculation method and 6 inoculation concentration as test materials.The result showed that the highest morbility was mixed soil just before planting with concentration of 2‰-3‰.