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用选育的小菜蛾敏感品系 (S)和抗溴氰菊酯品系 (R)为亲本 ,采用LD-P线法 ,分析了小菜蛾对溴氰菊酯的抗性遗传方式。结果表明 ,抗性为常染色体多基因遗传 :正、反杂交F1的显性度D值分别为 - 0 5 0 84和 - 0 45 5 6 ,其主效基因为不完全隐性遗传效应。抗性现实遗传力h2 =0 1 35 ,说明抗性产生速率较快 ,出现高抗性的风险较大。亲本和杂交后代幼虫多功能氧化酶 (MFO)环氧化活性与溴氰菊酯抗性水平呈正相关性
The inheritance of resistance to deltamethrin in diamondback moth (Plutella xylostella) was analyzed by using LD-P line with the selected susceptible strains of diamondback moth (S) and deltamethrin (R) as parents. The results showed that the resistance was autosomal polygenic inheritance. The dominant D value of F1 hybrids was -05084 and -04556, respectively. The major gene was incomplete recessive genetic effect. Resistance Heritability h2 = 0 1 35, indicating that the rate of resistance to produce faster, high risk of higher resistance. There was a positive correlation between the epoxidation activity of MFO and the deltamethrin resistance level in parents and hybrid offspring