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MBE Advance Access published online on June 2, 2004
Molecular Biology and Evolution, doi:10.1093/molbev/msh183
Molecular Biology and Evolution © Society for Molecular Biology and Evolution 2004; all rights reserved
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Accepted May 28, 2004

Original Articles

Complex Evolution of Gypsy in Drosophilid Species

Fabiana Herédia 1, Elgion Lúcio S. Loreto 2*, Vera Lúcia S. Valente 1

1 Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, CEP 91501-970, Porto Alegre, RS, Brazil
2 Departamento de Biologia, Instituto de Ciências Exatas e Naturais, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil

* To whom correspondence should be addressed. E-mail: elgion{at}base.ufsm.br.


  Abstract

In an endeavor to contribute to the comprehension of the evolution of transposable elements (TEs) in the genome of host species, we investigated the phylogenetic relationships of sequences homologous to the retrotransposon gypsy of Drosophila melanogaster in 21 species of Drosophila, in Scaptodrosophila latifasciaeformis and in Zaprionus indianus. This phylogenetic study was based on approximately 500 bp of the env gene. Our analyses showed considerable discrepancy between the phylogeny of gypsy elements and the relationship of their host species, and allow us to infer a complex evolutionary pattern that could include ancestral polymorphism, vertical transmission and several cases of horizontal transmission.

Key Words: gypsy, Drosophila, retrotransposon, phylogeny, horizontal transfer


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