The sex-determination genes fruitless and doublesex specify a neural substrate required for courtship song.

The sex-determination genes fruitless and doublesex specify a neural substrate required for courtship song.
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DOI:
10.1016/j.cub.2007.07.047
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发表时间:
2007-09-04
期刊:
影响因子:
9.2
通讯作者:
Goodwin, Stephen F.
Goodwin, Stephen F.
中科院分区:
生物学1区
文献类型:
--
作者:
Rideout, Elizabeth J.;Billeter, Jean-Christophe;Goodwin, Stephen F.

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求偶歌是果蝇雄性求偶行为的一个重要组成部分,它使雌性更容易接受交配和交流物种特异性信息。性镶嵌研究表明,中枢神经系统(CNS)某些区域的性别对歌曲的产生至关重要。我们的检查这些地区之一,mesothoracic神经节(Msg),揭示了两个性别决定基因的共表达,fruitless(fru)和doubletex(dsx)。因为这两个基因都参与创造一个性的二态中枢神经系统,是必要的歌曲生产,我们调查的个人贡献的fru和dsx的规格的男性中枢神经系统和歌曲生产。我们显示了一个新的要求,DSX在指定性二态性群体的果表达神经元的Msg。此外,通过使用女性组成性表达的男性特异性亚型的fru(FruM),我们显示了一个关键的要求,男性亚型的dsx(DsxM),一起FruM,在求爱歌的规格。因此,虽然FruM表达是足够的性能,许多男性特定的行为,我们已经表明,没有DsxM,确定一个男性特定的中枢神经系统,从而男性行为的完整补充没有实现。
Courtship song is a critical component of male courtship behavior in Drosophila, making the female more receptive to copulation and communicating species-specific information. Sex mosaic studies have shown that the sex of certain regions of the central nervous system (CNS) is critical to song production. Our examination of one of these regions, the mesothoracic ganglion (Msg), revealed the coexpression of two sex-determination genes, fruitless (fru) and doublesex (dsx). Because both genes are involved in creating a sexually dimorphic CNS and are necessary for song production, we investigated the individual contributions of fru and dsx to the specification of a male CNS and song production. We show a novel requirement for dsx in specifying a sexually dimorphic population of fru-expressing neurons in the Msg. Moreover, by using females constitutively expressing the male-specific isoforms of fru (FruM), we show a critical requirement for the male isoform of dsx (DsxM), alongside FruM, in the specification of courtship song. Therefore, although FruM expression is sufficient for the performance of many male-specific behaviors, we have shown that without DsxM, the determination of a male-specific CNS and thus a full complement of male behaviors are not realized.
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