Biologia de Anofelinos amazônicos. V. Polimorfismo cromossômico de Anopheles darlingi Root (Diptera, Culicidae)

Population genetic structure of the major malaria vector Anopheles darlingi (Diptera: Culicidae) from the Brazilian Amazon, using microsatellite markers

“…Earlier studies of An. darlingi from central Amazonian Brazil using polytene chromosomes (Kreutzer et al 1972, Tadei et al 1982) and isozymes (Rosa-Freitas et al 1992, Manguin et al 1999 detected no suggested intra-populational differentiation making the Wahlund effect an unlikely explanation. Taken together, these observations strongly suggest the presence of null alleles in An.…”

“…Polytene chromosome analysis revealed high polymorphism in An. darlingi, with fixed inversions between samples from Southeast-ern and Northern Brazil, and a high frequency of heterozygote inversions detected in Northern Brazil (Kreutzer et al 1972, Tadei et al 1982). Subsequently, other population studies of An.…”

“…Much of the variability detected in An. darlingi could be related to an adaptive strategy to exploit distinctive ecological niches within its extensive range (Kreutzer et al 1972, Tadei et al 1982 while the population structure and differentiation may be explained by differences in the effective population size, patterns of gene flow and historical and recent colonization events across its range.…”

Biological variation in Anopheles darlingi root

“…In a more extensive study Kreutzer et al (1972) described nine independent inversions. This number was increased to twelve by Tadei et al (1982) who examined larval populations from the Manaus-Boa Vista highway close to the centre of distribution of the species. They found a high degree of herterozygosity with inversions distributed on all chromosomes (one on the X, four on 2R, two on 2L, three on 3R and two on 2L).…”

Location of ribosomal genes in the chromosomes of Anopheles darlingi and Anopheles nuneztovari (Diptera, Culicidae) from the Brazilian Amazon

“…However, comparisons of chromosomal variability among A. darlingi populations from Northern and Southern Brazil have revealed a higher frequency of heterozygous inversions in the northern populations (Kreutzer et al 1972, Tadei et al 1982. In contrast, environmental and isoenzymatic variations (Fritz et al 1995, Scarpassa et al 1999, ITS2 (Fritz et al 1994, Onyabe & Conn 1999) and mitochondrial DNA marker (Conn et al 1998, Scarpassa et al 2000 analyses have shown important geographic interpopulational differences in A. nuneztovari, and it is still not clear whether A. nuneztovari is a single variable species or a complex of species.…”