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Insect Mol Biol. 1998 Nov;7(4):355-66.

The Bactrocera tryoni homologue of the Drosophila melanogaster sex-determination gene doublesex.

Author information

1
Fruit Fly Research Centre, School of Biological Sciences, University of Sydney, New South Wales, Australia. dshearma@bio.usyd.edu.au

Abstract

A homologue of the bifunctional sex-determining gene, doublesex (dsx), has been identified in the tephritid fruit fly, Bactrocera tryoni, and has been found to be expressed in a sex-specific manner in adult flies. The male- and female-specific cDNAs are identical at their 5' ends but differ at their 3' ends and appear to be the products of alternate splicing. The level of identity of the sex-specific DSX proteins of B. tryoni with the D. melanogaster DSX proteins, across the region corresponding to the DNA binding domain and the oligomerization domains, is greater than 85%. Four sequence motifs which are ten to thirteen bases identical to the TRA/TRA-2 binding sites (thirteen-nucleotide repeat sequences) are present in the female-specific exon of the B. tryoni dsx gene.

[Indexed for MEDLINE]

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