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Chromosomal inversion polymorphism in Anopheles gambiae and Anopheles arabiensis in Tanzania

Published online by Cambridge University Press:  19 September 2011

A. E. P. Mnzava  and
M. A. Di Deco
A. E. P. Mnzava
Affiliation:
National Institute for Medical Research, Ubwari Research Station, P. O. Box 81, Muheza, Tanzania
M. A. Di Deco
Affiliation:
Instituto di Parassitologia, Universita “La Sapienza” — Roma, Roma, Italia
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Abstract

Chromosomal inversion polymorphism was investigated in samples of Anopheles gambiae sensu lato collected from different localities of Tanzania. An. merus was found monomorphic, while two widespread inversion polymorphisms were recorded in both An. gambiae sensu stricto (2Rb/+ and 2La/+) and An. arabiensis (2Rb/+ and 3Ra/+). Two additional polymorphic inversions (2 Rbr and 2Rq), generally associated, were observed in An. arabiensis from the Rift Valley. Observed karyotype frequencies were in agreement with those expected according to the Hardy-Weinberg equilibrium suggesting conditions of panmixia in both An. gambiae s.s. and An. arabiensis in the studied areas.

Résumé

Le polymorphisme de l'inversion chromosomique a été étudié sur des échantillons d'Anopheles gambiae sensu lato, collectés en divers endroits de Tanzanie. An. merus est apparu monomorphe, alors que 2 inversions polymorphes étendues étaient mises en évidence chez An. gambiae sensu stricto (2Rb/+ et 2La/+) et chez An. arabiensis (2Rb/+ et 3Ra/+). De plus, deux inversions polymorphes (2Rbr et 2Rq), généralement associées, on été observées chez An. arabiensis dans la Vallée du Rift. Les fréquences observées des caryotypes étaient en accord avec ce qui étaient espéré, selon l'équilibre de Hardy-Weinberg, suggérant les conditions d'une “panmixie” entre An. gambiae s.s. et An. arabiensis dans la région étudiée.

Keywords

ChromosomalinversionpolymorphismAnopheles gambiaeAnopheles arabiensisAnopheles merusfrequency
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 11 , Issue 6 , December 1990 , pp. 861 - 863
Copyright
Copyright © ICIPE 1990

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References

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