[Resistance stability of rice varieties to different biotypes of brown planthopper].
In order to develop an effective analytical and monitoring method in breeding rice varieties with higher resistance stability to brown planthopper (BPH), Tai's method (1971) was employed to estimate the resistance stability of twelve rice varieties to different biotypes of BPH. It was shown that light intensity, seedling age, and nitrogen application rate had significant effects on the resistance performance and stability of rice varieties to different BPH biotypes. Among the varieties with resistance to BPH biotype II, the RHT, RP1976-18-6-4-2, and Ptb33 showed stable, IR56 showed unstable, while IR36 and ASD7 showed the most unstable resistance; whereas among the varieties susceptible to BPH biotype II, the TN1 showed stable, Guihuazhan, Foshanyouzhan and IR26 showed relatively stable, while Guojing No. 4 and Mudgo showed unstable susceptibility. For the rice varieties resistant to BPH biotype Bangladesh, the RHT, RP1976-18-64-2 and Ptb33 presented unstable, and IR56 presented very unstable resistance; whereas for the varieties susceptible to BPH biotype Bangladesh, the Guihuazhan, Foshanyouzhan and IR26 performed stable, TN1 and IR36 performed unstable, and Guojing No. 4, Mudgo and ASD7 performed the most unstable susceptibility.
Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning 530007, China. bqwu@gxaas.net
Bi-Qiu
BQ
Wu
Feng-Kuan
FK
Huang
Suo-Sheng
SS
Huang
Li-Ping
LP
Long
Su-Mei
SM
Wei
D000818:Animals; D017753:Ecosystem; D018506:Gene Expression Regulation, Plant; D006430:Hemiptera / Q000502:physiology*; D006790:Host-Parasite Interactions; D007300:Insect Control / Q000379:methods*; D012275:Oryza / Q000145:classification* / Q000235:genetics / Q000469:parasitology*