Shoukry A, Hamed M S, Said M A, Gad A M, Kenawy M A, el Said S
Entomology Department, Faculty of Science and Research, Ain Shams University, Abbassia, Cairo, Egypt.
J Egypt Soc Parasitol. 1990 Dec;20(2):683-9.
The genetics of fenitrothion resistance in Cx. pipiens larvae was studied to determine its mode of inheritance. A laboratory susceptible and fenitrothion-resistant larval strains were used. Reciprocal crosses between the resistant and susceptible strains showed an F1 generation of partial dominance with slight cytoplasmic effect. The F2 generation underwent segregation into three genotypes, viz. susceptible, hybrid and resistant in the ratio of 1:2:1. The progenies of backcrosses to resistant and susceptible parents were in a 1:1 ratio of the same phenotypes as the parents and hybrids involved. After selection, the progeny of the back-crosses to resistant parent exhibited full resistance. It is concluded that fenitrothion resistance in Cx. pipiens larvae is due to monofactorial inheritance with partial dominance and slight cytoplasmic effect.
为确定淡色库蚊幼虫对杀螟硫磷抗性的遗传方式，对其进行了研究。使用了实验室敏感和对杀螟硫磷有抗性的幼虫品系。抗性品系和敏感品系之间的正反交显示，F1代表现出部分显性且有轻微细胞质效应。F2代分离为三种基因型，即敏感型、杂合型和抗性型，比例为1:2:1。与抗性和敏感亲本回交的后代与亲本和杂合子具有相同表型，比例为1:1。经过选择后，与抗性亲本回交的后代表现出完全抗性。得出结论，淡色库蚊幼虫对杀螟硫磷的抗性是由于单因子遗传，具有部分显性和轻微细胞质效应。
