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Genetical Studies on Resistance to Chlorinated Hydrocarbons in Euxesta notata (Wied.)

Published online by Cambridge University Press:  31 May 2012

J. N. Telford  and
A. W. A. Brown
J. N. Telford
Affiliation:
Department of Zoology, University of Western Ontario, London
A. W. A. Brown
Affiliation:
Department of Zoology, University of Western Ontario, London
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Abstract

The inheritance of dieldrin-resistance and DDT-resistance was studied in a laboratory colony of the spotted root maggot Euxesta notata collected in 1960 at Delhi, Ontario. By appropriate selection methods the colony was divided into 4 strains, namely dieldrin-resistant, dieldrin-susceptible, DDT-resistant and DDT-susceptible. Crosses made between the R and S strains showed that dieldrin-resistance segregated sharply, and was inherited as if due to a single gene allele. An excess of heterozygotes over that expected suggested a certain amount of over-dominance with respect to survival. DDT-resistance did not segregate sharply, but the results of the various crosses were in agreement with the idea that this factor, which was very slightly dominant, was due to a single gene allele. Cross-resistance data for R and S strains indicated that dieldrin-resistance and DDT-resistance were completely separate entities in this species.

Type
Articles
Information
The Canadian Entomologist , Volume 96 , Issue 4 , April 1964 , pp. 625 - 636
Copyright
Copyright © Entomological Society of Canada 1964

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