摘要
通过室内筛选试验,评估了小菜蛾对多杀菌素的抗性风险,并对抗性遗传和交互抗性进行初步研究。以采自广东深圳小菜蛾为起始种群(SZ),在室内筛选26代,获得1个中等抗性水平的品系(SZ-Sp in)。该品系与SZ品系相比,抗性提高到22.4倍,与PH I-S敏感品系相比抗性达到60.7倍。在筛选过程中,小菜蛾对多杀菌素平均抗性现实遗传力较低(0.09),表明小菜蛾对多杀菌素产生抗性的速度较慢。SZ-Sp in抗性品系与PH I-S敏感品系正、反交试验结果表明,小菜蛾对多杀菌素的抗性为不完全隐性、常染色体遗传。SZ-Sp in抗性品系对阿维菌素、氟虫腈、杀虫单没有交互抗性。
The SZ-Spin strain was selected with spinosad from a field-collected strain （SZ） of the diamondback moth, Plutella xy- lostella L.. After twenty six generations of selection, resistance to spinosad of the selected SZ-Spin strain increased to 22.4-fold compared with that of the SZ strain, and 60. 7-fold resistance compared with that of a susceptible strain （PHI-S）. The mean realized heritability of spinosad resistance during selection was 0.09, indicating resistance development potential was low. Genetic cross experiment showed that spinosad resistance in the SZ-Spin strain was autosomal and incompletely recessive. Selection for re- sistance to spinosad did not result in cross-resistance to abamectin, fipronil and monosuhap in the SZ-Spin strain.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2007年第1期61-65,共5页
Journal of Nanjing Agricultural University
基金
国家863项目(2004AA249040)
国家自然科学基金重点项目(30530530)
关键词
小菜蛾
多杀菌素
抗性遗传
交互抗性
Plutella xylostella L.
spinosad
resistance inheritance
cross-resistance
