International Journal of Tropical Insect Science

, Volume 11, Issue 6, pp 861–863 | Cite as

Chromosomal Inversion Polymorphism in Anopheles Gambiae and Anopheles Arabiensis in Tanzania

  • A. E. P. Mnzava
  • M. A. Di Deco
Research Article


Chromosomal inversion polymorphism was investigated in samples of Anopheles gambiae sensu lato collected from different localities of Tanzania. An. merits 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.

Key Words

Chromosomal inversion polymorphism Anopheles gambiae Anopheles arabiensis Anopheles merus frequency 


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.


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Copyright information

© ICIPE 1990

Authors and Affiliations

  • A. E. P. Mnzava
    • 1
  • M. A. Di Deco
    • 2
  1. 1.National Institute for Medical ResearchUbwari Research StationMuhezaTanzania
  2. 2.Instituto di ParassitologiaUniversita “La Sapienza” — RomaRomaItalia

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