Identification of Antixenosis and Antibiosis in Two Newly Explored Brown Planthopper-resistance Rice Lines

Yong-fu Qiu；Ling Cheng；Ping Zhou；Fang Liu；Rong-bai Li

Antibiosis ； antixenosis ； brown plant hopper (nilaparvata lugens stål) ； oryza rufipogon ； resistance resource

Advance Journal of Food Science and Technology

4卷5期（2012 / 10 / 20）

299 - 303

英文

The rice brown plant hopper (Nilaparvata lugens Stål, BPH) is one of the typical piercing-sucking insect pests to feed on rice phloem sap. Breeding and cultivation of resistant rice varieties is the most economical and efficient method for managing the BPH. In the present study, we aimed to detect the BPH-resistance level of two newly explored rice lines and to identify the BPH-resistance mechanism of the resistant lines with respect to physiological function. Consequently, rice lines Q660 and Q327 exhibited a highly resistant to the BPH insects with the average resistance scores of 2.8 and 3.2, respectively in the seedling bulk test. The settling BPH numbers were significant less in the Q660 plant at 48 h and in the Q327 plant at 120 h after release, indicating that antixenotic factors were presented in both rice lines. After treated with 4 days, the BPH population growth rates were significantly restrained in the resistant rice lines Q660 and Q327 indicated by the weight changes of the BPH on the different genotypic plants. Furthermore, the BPH survival rates on the rice line Q660 also significantly decreased compared with that on the rice line 93-11 after treated with 4 days. By contrast, there was no significant difference in the survival rate between Q327 and 93-11 plants. The identified resistant rice lines should be of great benefit for the BPH-resistant rice varieties.