棉铃虫对氰戊菊酯抗性遗传分析

本文采用剂量对数-死亡机率值回归线(LD-P线)分析法， 利用室内选育的棉铃虫 Heliccverpa armitera(Hubner)对氰戊菊酯抗性晶系和敏感品系，研究了棉铃虫对氰戊菊酯的抗性遗传规律。结果表明，棉铃虫对氰戊菊酯的抗性为多基因遗传，其主要基因为不完全显性，抗性不属性连锁遗传。利用增效剂对抗性机理进行的研究表明，多功能氧化酶(MFO)是棉铃虫对氰戊菊酯产生抗药性的主要因子，因此，可以推断多功能氧化酶基因为不完全显性。

GENETIC ANALYSIS OF FENVALERATE RESISTANCE IN COTTON BOLLWORM,HELIOTHIS ARMIGERA (HUBNER) (LEPIDOPTERA: NOCTUIDAE)

The mode of inheritance of resistance to fenvalerate in cotton bollworm, Hclicoverpa armigera(Hubner),was evaluated from log dosage-probit mortality curves constructed from the response of third instar larvae to fenvalerate treatment.The insects used for the study were taken from laboratory reared susceptible and resistant strains; the resistant strain exhibited over 2000-fold resistance to fenvalerate as compared with the susceptible strain. The results of genetic analysis indicated that fenvalerate resistance in cotton bollworm appeared to be controlled by two or more autosomal genes and the major gene (s) involved was incompletely dominant. Synergism of PBO revealed that MFO was mainly responsible for the resistace, so the MFO gene was incompletely dominant.