RICE SCIENCE ›› 2013, Vol. 20 ›› Issue (1): 73-78.DOI: 10.1016/S1672-6308(13)60110-9

• Research Paper • Previous Articles    

Identification and Genetic Analysis of Gall Midge Resistance in Rice Germplasm 91-1A2

  1. 1College of Agronomy, Guangxi University, Nanning 530004, China; 2Flower Research Institute, Guangxi Academy of Agricultural Science, Nanning 530007, China; 3Plant Protection Research Institute, Guangxi Academy of Agricultural Science, Nanning 530007, China
  • Online:2013-01-28 Published:2013-01-06
  • Contact: HE Long-Fei
  • Supported by:

    This work was financially supported by the Natural Science Foundation of Guangxi Province (Grant No. 0007015); Science Research and Technology Develop- ment Program of Guangxi Province (Grant Nos. 0012027 and 9939006) and Foundation of New Century Ten-Hundred-Thousand Talents of Guangxi, China (Grant No. 2003213).

Abstract:

Resistance to rice gall midge in rice germplasm 91-1A2 was identified and genetically analyzed. F1s of rice population were derived from 91-1A2 which crossed with rice materials Jinggui, TN1, W1263 (Gm1), IET2911 (Gm2), BG404-1 (gm3), OB677 (Gm4), ARC5984 (Gm5) and Duokang 1 (Gm6) as a male parent. The resistance of all parental lines and F1, BC1F1 and F2 populations to rice gall midge was identified. The results showed that 91-1A2 and all F1s were resistant to Chinese rice gall midge biotype IV. The segregation ratio of resistant plants to susceptible ones in BC1F1 and F2 were accorded with 1:3 and 9:7 rules by χ2 test, suggesting that the resistance of 91-1A2 to Chinese rice gall midge biotype IV was controlled by two dominant genes which were new resistance genes, non-allelic to the known rice gall midge resistance genes.

Key words: rice , rice gall midge , resistance gene , genetic analysis