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High Levels of Hybridization between Molecular Forms of Anopheles gambiae from Guinea Bissau
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik, Systematisk zoologi.
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2008 (Engelska)Ingår i: Journal of medical entomology, ISSN 0022-2585, E-ISSN 1938-2928, Vol. 45, nr 6, s. 1057-1063Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the malaria vector Anopheles gambiae Giles sensu stricto, two molecular forms denoted M and S are considered units of incipient speciation within this species. Very low hybrid frequencies and significant genetic differentiation have been found in sympatric M- and S-form populations, We studied the molecular form composition and the degree of genetic differentiation at 15 microsatellites in two samples of An. gambiae collected ill two consecutive years from Bissau, Guinea Bissau. High frequencies of M/S hybrids (19-24%) were found in this area. Coincidently, very low levels of genetic differentiation were detected between forms when analysis involved microsatellites mapped at chromosome-3 (mean F-st 0.000-0.002). The single exception was the X-linked AGXH678, for which high differentiation was measured (F-st 0.158-0.301). This locus maps near the centromere of chromosome X, a low recombination region in which selection is likely to promote divergence between M and S forms. These results strongly suggest that the degree of isolation between M and S forms, considered the units of incipient speciation within An. gambiae, is not homogenous throughout the species distribution range.

Ort, förlag, år, upplaga, sidor
2008. Vol. 45, nr 6, s. 1057-1063
Nyckelord [en]
Anopheles gambiae, molecular forms, hybrids, speciation
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:uu:diva-107087ISI: 000260661000012PubMedID: 19058629OAI: oai:DiVA.org:uu-107087DiVA, id: diva2:227646
Tillgänglig från: 2009-07-16 Skapad: 2009-07-16 Senast uppdaterad: 2017-12-13Bibliografiskt granskad

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