Differentiation and genetic variability in natural populations of Anopheles (N.) triannulatus (Neiva & Pinto, 1922) of Brazilian Amazonia.
Populations of Anopheles triannulatus from Macapá (AP), Aripuanã (MT), Ji-Paraná (RO), and Manaus-Janauari Lake (AM) were studied using 16 enzymatic loci. The results of the isozyme analysis showed that the population of Macapá presented higher polymorphism (56.3%). The lowest variability was observed in the population of Manaus (p = 25.0; Ho = 0.077 +/- 0.046). The results of Wright's F statistics showed unbalance due to excess of homozygotes (F(is) > F(st)), denoting a certain intrapopulational differentiation. Although the populations are genetically very close (D = 0.003-0.052), the dendrogram separates the populations in two groups: Macapá separated from that of Manaus, Ji-Paraná, and Aripuanã. This result may suggest a reduction in the genic flow, which possibly had some influence in the substructuration of the populations.
Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Petrópolis, C.P. 478, CEP 69011-970, Manaus, AM, Brazil. jsantos@inpa.gov.br
J M M
JM
Santos
J F
JF
Maia
W P
WP
Tadei
D000483:Alleles; D000818:Animals; D000852:Anopheles / Q000145:classification* / Q000201:enzymology / Q000235:genetics; D001938:Brazil; D014644:Genetic Variation; D007527:Isoenzymes / Q000235:genetics; D011110:Polymorphism, Genetic; D013045:Species Specificity
D007527:Isoenzymes