In 2 n =12, all the red forms of the aphids have translocations of autosomal 1 and 3, but the yellowish-green forms contain autosomal 1 and 3 translocated individuals as well as normal karyotype ones.

• 3n =18；A1与A3 易位 .；同时；在核型为 2n =12的烟蚜中；体色为红色的个体全为A1与A3 易位个体；体色为绿色的个体中既有A1与A3 易位个体；又有正常个体