The evolution of courtship behaviors through the origination of a new gene in Drosophila.
Proc Natl Acad Sci U S A
; 105(21): 7478-83, 2008 May 27.
Article
em En
| MEDLINE
| ID: mdl-18508971
ABSTRACT
New genes can originate by the combination of sequences from unrelated genes or their duplicates to form a chimeric structure. These chimeric genes often evolve rapidly, suggesting that they undergo adaptive evolution and may therefore be involved in novel phenotypes. Their functions, however, are rarely known. Here, we describe the phenotypic effects of a chimeric gene, sphinx, that has recently evolved in Drosophila melanogaster. We show that a knockout of this gene leads to increased male-male courtship in D. melanogaster, although it leaves other aspects of mating behavior unchanged. Comparative studies of courtship behavior in other closely related Drosophila species suggest that this mutant phenotype of male-male courtship is the ancestral condition because these related species show much higher levels of male-male courtship than D. melanogaster. D. melanogaster therefore seems to have evolved in its courtship behaviors by the recruitment of a new chimeric gene.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Comportamento Sexual Animal
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Genes de Insetos
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Corte
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Drosophila melanogaster
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Evolução Biológica
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article