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Identification of the karyotype of Drosophila zottii: metaphase chromosomes

Silvio Gomes Monteiro; Rosana de Almeida; Nilda Maria Diniz; Fábio de Melo Sene

Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo,14049-900 Ribeirão Preto, SP, Brasil. Send correspondence to F.M.S.

ABSTRACT

We describe the karyotype of Drosophila zottii, one of the seven species of the repleta subgroup of the repleta group. The metaphases analyzed showed four chromosome pairs (2n=8), thus indicating fusion of two pairs when compared to the basic metaphase structure of the repleta subgroup. The chromosome fusions (2-3F and 4-5F) detected in this species may contribute to a better understanding of the phylogenetic relationships of the repleta subgroup or of other subgroups.

Keywords: karyotype; Drosophila zottii; metaphase chromosomes.

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