棉铃虫对溴氰菊酯的抗性遗传及其生化机理

用经室内诱导的抗溴氰菊酯棉铃虫Helicoverpa armigera(Hubner)种群与室内饲养多年的敏感种群进行杂交，研究了棉铃虫对溴氰菊酯的抗性遗传规律。结果表明：杂交后的显性度(D)分别为0.34和0.35，F₁与亲本回交的期望值与实际值在比值是1 ∶1时差异显著，回交平台在35%～45%，棉铃虫对溴氰菊酯的抗性可能是一个以上主基因的不完全显性遗传。生化分析表明，抗性种群的。-乙酸萘酯酶活力与敏感种群的差异显著，这可能是棉铃虫对溴氰菊酯产生高抗药性的重要解毒酶之一。

GENETICS AND MECHANISM OF RESISTANCE TO DELTAMETHRIN IN COTTON BOLLWORM HELICOVERPA ARMIGERA (HUBNER)

The methods of cross and back-cross between resistant and susceptible populations were used for exploring the inheritance mode of resistance to deltamethrin in the cotton bollworm Helicoverpa armigera (Htubner). The results showed that the degree of dominance of F_Rs and F_sR were 0.34 and 035, respectively. The difference between expectations and actual values of both backcross ratios of RS∶SS and SR ∶SS was significant at 1∶1, and the backcross plateaus were at 35%-45%, suggesting that the resistance of cotton bollworm to deltamethrin was controlled by the incompletely dominant genes. The anaphthylacetate esterase may be an improtant factor resulting the resistance of cotton bollworm to deltamethrin.