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Memórias do Instituto Oswaldo Cruz
Print version ISSN 0074-0276
CAMPOS, Jairo; ANDRADE, Carlos Fernando S and RECCO-PIMENTEL, Shirlei M. Chromosomal comparisons among and within populations of Simulium (Chirostilbia) pertinax (Diptera, Simuliidae). Mem. Inst. Oswaldo Cruz [online]. 2001, vol.96, n.3, pp. 365-369. ISSN 0074-0276. http://dx.doi.org/10.1590/S0074-02762001000300014.
Chromosomal studies were carried on six larval populations of Simulium (Chirostilbia) pertinax from different locations in Brazil. Larvae were collected in the states of Paraná, Rio Grande do Sul, Rio de Janeiro and São Paulo. Polytene chromosome map comparisons within and among populations showed no differences in banding pattern, except for some limited polymorphism (secondary NOR and four band polymorphisms). There were no chromosomal variations associated with the resistance or susceptibility of the larvae to temephos. The chromosomal homosequentiality found among the six populations suggests that S. pertinax may be a monomorphic species.
Keywords : cytology; insecticide resistance; polytene chromosomes.