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Inheritance of dieldrin-resistance in Cimex lectularius L. and Pediculus h. humanus L

  • A. M. Guneidy (a1) and J. R. Busvine (a1)

Extract

The mode of inheritance of dieldrin-resistance in Cimex lectularius L. and Pediculus h. humanus L. was investigated. The method involved the determination of dosage/mortality regression lines by exposing batches of insects to a range of dieldrin concentrations. Reciprocal crosses were made between normal (N) and resistant (R) strains of each insect, and the F1 and F2 progeny were examined for susceptibility levels over a wide range of concentrations of dieldrin. Back-crosses were made from the F1 generation to N and R strains, and the progeny were examined in the same way. In some cases, further back-crosses were made after elimination of susceptible individuals from the progeny of the first back-cross.

All the results with C. lectularius were consistent with monofactorial inheritance of dieldrin-resistance through a gene of intermediate dominance. With P. h. humanus, the results were complicated by an apparent maternal effect which caused the F1 and F2 generations from a N ♀ × R ♂ cross to be less resistant than those from a R ♀ × N ♂ cross. In general, however, the results indicated genetic segregation consistent with the same type of monofactorial inheritance as that found in C. lectularius.

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Adkins, T. R. jr & Arant, F. S. (1959). A technique for the maintenance of a laboratory colony of Cimex lectularius L. on rabbits.—J. econ. Ent. 52 pp. 685686.
Busvine, J. R. (1958). Insecticide-resistance in bed-bugs.— Bull. World Hlth Org. 19 pp. 10411052.
Busvine, J. R. & Lien, J. (1961). Methods of measuring insecticide susceptibility levels in bed-bugs, cone-nosed bugs, fleas and lice.—Bull. World Hlth Org. 24 pp. 509517.
Buxton, P. A. (1947). The louse. 2nd edn., 164 pp. London, E. Arnold.
Guneidy, A. M. & Busvine, J. R. (1964). Genetical studies on dieldrin-resistance in Musca domestica L. and Lucilia cuprina (Wied.)Bull. ent. Res. 55 pp. 499507.

Inheritance of dieldrin-resistance in Cimex lectularius L. and Pediculus h. humanus L

  • A. M. Guneidy (a1) and J. R. Busvine (a1)

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