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Health Organisation, Malaria Comission; World Health Organization : Organisation Mondiale de la Sante; Serie de Monographies, Issue No. 328: Speciation in Anopheles Gambiae, Giles

By G. Elizabeth Jackson

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Book Id: WPLBN0000050115
Format Type: PDF eBook
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Reproduction Date: 2005
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Title: Health Organisation, Malaria Comission; World Health Organization : Organisation Mondiale de la Sante; Serie de Monographies, Issue No. 328: Speciation in Anopheles Gambiae, Giles  
Author: G. Elizabeth Jackson
Volume:
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Historic
Publication Date:
Publisher: World Health Organization

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Jackson, G. E. (n.d.). Health Organisation, Malaria Comission; World Health Organization : Organisation Mondiale de la Sante; Serie de Monographies, Issue No. 328. Retrieved from http://members.worldlibrary.net/


Description
Medical Reference Publication

Excerpt
In the course of studies on the mode of inheritance-of dieldrin-resistance in . . . . -. . , - Anopheles gmbiae, Giles, it was found that crosses between the first resistant and susceptible strains used, produced sterile F1 males (navidson, 1956). On dissection these males were found to have atrophied testes, usually completely devoid of spermatozoa, The females of this F generation, on the other hand, were apparently 1 normal reproductively and could be back-crossed to the males of either parent strain. It was first thought that this sterility was associated with resistance and not until fbrther strains of A. gambiae were acquired was this shown not to be so. A total of 15 strains of this species have now been used in crossing experiments. These are: 1. Lagos An iqsecticide-susceptible strain from Lagos, Nigeria. 2. Maidahini ) Two insecticide-susceptible strains from the Western Sokoto 3. Diggi ) Region of Northern Nigeria, obtained in 1956, from outside the dieldrin-sprayed area. 4. Ambursa A homozygous, dieldrin-resistant strain from within the dieldrin-sprayed area, Western Sokoto, Northern Nigeria. 5. Tungan Buzu An apparently insecticide-susceptible strain acquired in 1961 from near Ambursa, four years after dieldrin had been replaced by DDT.

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