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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2013年50 No.6

Identification of rice varieties resistant to the small brown planthopper (Laodelphax striatellus) in Liaoning and an investigation of their resistance mechanisms
Author of the article:SHAO LingYun1,2**SUN FuYu2WANG XiaoQi1***LI ZhiQiang2YU FengQuan2YANG Mei2
Author's Workplace:1. College of Plant Protection, Shenyang Agricultural University, Shenyang110161, China; 2. Institute of Plant Protection, Liaoning Academy of Agricultural Sciences, Shenyang110161, China
Key Words:small brown planthopper, rice varieties, identification for resistance, resistance mechanism, antixenosis, antibiosis
Abstract:
  • Resistance levels and mechanisms of rice varieties in Liaoning Province to the small brown planthopper, Laodelphax striatellus (Fallén), were investigated. Resistance to the small brown planthopper was evaluated in 42 cultivated rice varieties, including widely used varieties and those waiting for extension in Liaoning Province. IR36 and Wuyujing3 were used as resistant control and susceptible control rice varieties, respectively, and evaluation was undertaken using a modified seedbox screening test. 20 rice varieties with different resistance levels were selected to test their antixenosis and antibiosis mechanisms. Of the 42 varieties tested, one resistant variety, namely Liaoyou5218, was found, along with 11 moderately resistant varieties. All of the other varieties were susceptible or highly susceptible. Compared with conventional rice, hybrid rice is more resistant to small brown planthopper. Among the resistant varieties, diffuse rice varieties are more numerous than compact ones. The resistance mechanism study showed that the resistant variety Liaoyou5218 and the moderately resistant variety Gangyu129 had strong antixenosis and antibiosis against small brown planthopper, and the moderately resistant varieties Gangyuan8 and Jingyou558 had relatively strong antixenosis. These varieties provide ideal genetic resources for breeding new resistant rice varieties. Nevertheless, most of the main cultivated rice varieties in Liaoning are susceptible to the small brown planthopper.
     
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