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Luo, Ya; Zhao, Santao; Li, Jiahui; Li, Peizheng; Yan, Rihui
Journal of insect science, 03/2017, Letnik: 17, Številka: 2Journal Article
transformer (tra) is a switch gene of sex determination in many insects, particularly in Dipterans. However, the sex determination pathway in Bactrocera cucurbitae (Coquillett), a very destructive pest on earth, remains largely uncharacterized. In this study, we have isolated and characterized one female-specific and two male-specific transcripts of the tra gene (Bcutra) of B. cucurbitae. The genomic structure of Bcutra has been determined and the presence of multiple conserved Transformer (TRA)/TRA-2 binding sites in Bcutra has been found. BcuTRA is highly conservative with its homologues in other tephritid fruit flies. Gene expression analysis of Bcutra at different developmental stages demonstrates that the female transcript of Bcutra appears earlier than the male counterparts, indicating that the maternal TRA is inherited in eggs and might play a role in the regulation of TRA expression. The conservation of protein sequence and sex-specific splicing of Bcutra and its expression patterns during development suggest that Bcutra is probably the master gene of sex determination of B. cucurbitae. Isolation of Bcutra will facilitate the development of a genetic sexing strain for its biological control.
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in: SICRIS
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