Inheritance of malathion resistance in the german cockroach
1973
Cochran, Donald G.
Malathion resistance in the German cockroach has been examined with respect to its inheritance pattern and linkage relationship. A resistant strain was crossed reciprocally with an unmarked and two marked susceptible strains. The progeny from F₁, F₂ and backcrosses were tested for resistance to malathion by exposure to toxicant-impregnated filter paper, and were classified according to marker traits where appropriate. Malathion resistance (R-Mal) is inherited as a simple autosomal dominant trait. Linkage studies showed R-Mal to be independent of or in group IV, pld in group VI, and T(9, 10) Pw marking both groups III and VIII. A possible malathion-resistance mechanism for this insect is discussed.
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