中文摘要：

应用数量遗传学中的阈性状分析法，计算米象对甲酸乙酯的抗性现实遗传力，并对米象的抗药性风险进行了评估。结果表明，在平均死亡率为57．4％的选择压力下，米象对甲酸乙酯的抗性现实遗传力（h^2）为0．0646，在此选择压力下要使米象对甲酸乙酯产生10倍的抗药性，共需要选育179代。

英文摘要：

The resistant risk of S. oryzae to ethyl formate（EtF） was assessed using the realized heritability （h^2） of quantitative genetics. The realized heritability of resistance of S. oryzae to EtF was 0. 0646 at the selec- tion pressure while the 57.4% mortality. At the condition of this pressure, the selection of 179 genera- tions should be conducted if the resistance of S. oryzae to EtF amounted to 10 fold.