The mode of inheritance of fenitrothion resistance in Culex pipiens L. larvae (Diptera:Culicidae).
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.
Shoukry
A
A
Entomology Department, Faculty of Science and Research, Ain Shams University, Abbassia, Cairo, Egypt.
Hamed
M S
MS
Said
M A
MA
Gad
A M
AM
Kenawy
M A
MA
el Said
S
S
D000818:Animals; D003465:Culex / Q000235:genetics*; D005260:Female; D005278:Fenitrothion; D007303:Insect Vectors / Q000235:genetics*; D007305:Insecticide Resistance / Q000235:genetics; D007814:Larva; D008297:Male
D005278:Fenitrothion