以抗虫品种资源911A②为父本，分别与粳桂、TN1、W1263（Gm1）、 IET2911（Gm2）、BG4041（gm3）、OB677（Gm4）、ARC5984（Gm5）和多抗1号（Gm6）（母本）进行杂交、测交、自交，获得F1、BC1F1、F2群体，对亲本和各个群体进行稻瘿蚊的抗性鉴定，研究911A②的抗性基因和遗传规律。结果表明，911A②及其与其他品种杂交获得的F1都抗中国稻瘿蚊生物型Ⅳ型，杂交获得的BC1F1和F2对中国稻瘿蚊生物型Ⅳ型的抗虫和感虫植株分离比经χ2测验分别符合1∶3和9∶7，说明911A②对中国稻瘿蚊生物型Ⅳ型的抗性受2对显性基因控制。911A②所含的2对抗性基因与已知的6个抗性基因Gm1、Gm2、gm3、Gm4、Gm5和Gm6不等位，与其他5个抗性基因Gm7、Gm8、Gm9、Gm10、Gm11(t)也不等位。该抗性基因可能是2对新的抗性基因。
The resistance of a rice germplasm 911A② to the rice gall midge(GM) was identified and genetically analyzed. 911A② was used as male parent to hybridize, test cross with Jinggui, TN1, W1263（Gm1）, IET2911（Gm2）, BG4041（gm3）, OB677（Gm4）, ARC5984（Gm5）and Duokang 1（Gm6）, and their F1 selfpollinated， respectively. The resistance of all parental lines and the populations of F1, BC1F1, F2 to the rice gall midge were identified. The resullts showed that 911A② and all F1 resist to rice gall midge biotype Ⅳ of China. The segregation ratio of resistant plants to sensitive ones to rice gall midge biotype Ⅳ of China of BC1F1 and F2 accorded with 1(resistant)∶3(sensitive) and 9(resistant)∶7(sensitive) rule by χ2 test, suggesting that the resistance of 911A② to rice gall midge biotype Ⅳ of China was controlled by two dominant genes, which was nonallelic to the known resistant genes Gm1, Gm2, gm3, Gm4, Gm5and Gm6, as well as the other five resistant genes Gm7，Gm8，Gm9，Gm10, Gm11（t）. It suggested that the two genes are new rice gall midge resistance genes.
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