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Polytene chromosome analysis of a population of Simulium pertinax (Diptera: Simuliidae)

Jairo Campos G.^I; Shirlei M. Recco-Pimentel^II; Carlos Fernando S. Andrade^I

^IDepartamento de Zoologia, Instituto de Biologia (IB), Universidade Estadual de Campinas (UNICAMP), 13083-970 Campinas, SP, Brasil. Send correspondence to J.C.G.
^IIDepartamento de Biologia Celular, IB, UNICAMP, 13083-970 Campinas, SP, Brasil

ABSTRACT

ytological studies were performed on a semi-natural population of Simulium pertinax from Morungaba, State of Sao Paulo, Brazil. This species has 2n = 6 chromosomes, being one pair of metacentric and two pairs of submetacentric chromosomes. Polytene chromosome maps of the three autosomes from larval salivary gland cells were obtained. The chromosomes of this population have conspicuous centromeric regions and high morphological stability. Asynaptic regions were rare. Inversions and morphological altered bands were not detected in the population (N = 102). A comparison of the band patterns of S. pertinax maps with the standard for the subgenus Simulium showed many similarities in all chromosome arms.

Keywords: polytene chromosome; Simulium pertinax.

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