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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 5, 2002, pp. 691-694
Bioline Code: oc02133
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 5, 2002, pp. 691-694

 en Polytene Chromosome Map and Inversion Polymorphism in Drosophila mediopunctata check for this species in other resources
Galina Ananina; Alexandre A Peixoto; Wilma N Souza & Louis B Klaczko

Abstract

Drosophila mediopunctata check for this species in other resources belongs to the tripunctata group, and is one of the commonest Drosophila check for this species in other resources species collected in some places in Brazil, especially in the winter. A standard map of the polytene chromosomes is presented. The breakpoints of the naturally occurring chromosomal rearrangements are marked on the map. The distribution of breaking points through the chromosomes of D. mediopunctata is apparently non-random. Chromosomes X, II and IV show inversion polymorphisms. Chromosome II is the most polymorphic, with 17 inversions, 8 inversions in the distal region and 9 in the proximal region. Chromosome X has four different gene arrangements, while chromosome IV has only two.

Keywords
linkage disequilibrium - gene order - cytogenetic analysis - chromosome mapping

 
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