The genetic basis of the flightless characteristic in Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) was studied using two crossbreeding experiments to verify the inheritance of the flightless character which may be relevant if mating with wild populations takes place. In the first experiment, the segregating population (F2) was obtained by random mating within each F1 line. The proportion of flightless individuals reached 24–29% in the F2 generation. In the second experiment, the F1 individuals were crossed with the flightless individuals to develop a backcross (BC) population, which showed that the proportion of flightless individuals reached 33–59% in the BC population. Although the quantitative variation of flight ability in H. axyridis could also be due to a large proportion of loci with small effects, our results suggest that the flightless mutation is largely controlled by a single locus and that only H. axyridis individuals homozygous for the recessive alleles show the flightless characteristic.

中文翻译：

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异型口琴的不飞特性的遗传模式

利用两个杂交试验研究了异色瓢虫（帕拉斯）（鞘翅目：瓢虫科）的不飞特性的遗传基础，以验证不飞特性的遗传，如果与野生种群交配，这可能是相关的。在第一个实验中，隔离种群（F2）是通过在每条F1系中随机交配而获得的。在F2代中，无法飞行的人的比例达到24-29％。在第二个实验中，F1个体与无法飞行的个体杂交，形成回交（BC）种群，这表明在BC种群中，无法飞行的个体比例达到33-59％。尽管轴突线虫飞行能力的数量变化这也可能是由于基因座的比例较大，影响较小，我们的结果表明，不能飞行的突变主要由一个基因座控制，只有隐性等位基因纯合的嗜酸线虫（H.axyridis）个体显示了不能飞行的特征。