Anopheles gambiae Complex: Molecular Forms and-Occurrence of The KDR Gene.in Rural Southwestern Nigeria

NOUTCHA M.A.E. 10 PAGES (4311 WORDS) Zoology Thesis

ABSTRACT. An investigation focusing on themolecular forms-of Anopheles gambiae

complex and occurrence of the .knockdown resistanceIkdr gene) was carried out from June to

July 2001 and August to September 2002 at Igbo-Ora, NigeriJusirig aspirator and DNA

analyses; Of the 127 An. gambiae s. I. analysed.fhere were 66 (51:9%):.:tv1and61 (48.03%) S

forms, both recorded in An. gambiae s.s. andAnopheles arabiensis. The forms were virtually

sympatric throughout the study. Two of the An. gambiae s.s.examihed h~rbQured the kdr gene

(RR, RS). The occurrence ofthekdr gene at Igbo-Ora indicated theexisten2e of the gene in the

savanna woodland populations; earlier records were from the rain forest and Guinea savanna.

The implications of these results; within the context of incipient speciation in Anopheles

gambiae s.s. a~ediscussed.