Differentiation and genetic variability in natural populations of Anopheles (N.) triannulatus (Neiva & Pinto, 1922) of Brazilian Amazonia.

• Main Author: Santos, Joselita Maria M.
• Publication Date: 2004
• Other Authors: Maia, Juracy de Freitas, Tadei, Wanderli Pedro
• Format: Article
• Language: eng
• Source: Repositório Institucional do INPA
• DOI: 10.1590/S1519-69842004000200019
• Download full: https://repositorio.inpa.gov.br/handle/1/6568
• topic: Isoenzyme; Allele; Animal; Anopheles; Brazil; Classification; Enzymology; Genetic polymorphism; Genetic Variability; Genetics; Species difference; Alleles; Animals; Anopheles; Brazil; Isoenzymes; Polymorphism; Genetic; Species specificity; Variation (genetics)

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.